Big Type IIa Diamonds Glow at Sotheby's and Christie's

By Richard W. Wise, G.G.

©2008

At a Sotheby’s Magnificent Jewels auction held in New York on April 17th, a 24.42 carat D color Internally Flawless diamond sold for 3.6 million or better than $148,443 per carat. One day earlier at Christies another rectangular step cut diamond weighing 27.91 carats (pictured above left) sold for 4.04 Million or $145,933 per carat. In this case the early bird bought at Christies and saved himself $2,510 per carat.

Europeans Paying Big Premiums for type IIa diamonds:

All of the major diamonds in these two sales were the rare type IIa diamonds. Gems of this type are often called “Golconda” diamonds after the famous Indian mines that supplied a majority of the world’s diamonds until they were mined out in the early 18^th Century. Collectors, particularly Europeans are willing to pay high premiums for these rare gems and for good reason.

Most of the world’s big name diamonds, those mined before 1725, the Koh-I-Noor, the Sancy and The Hope diamond came from the fabled diamond mines of India, all are type II diamonds.

Type IIa is a rare type of diamond that contains no measurable amounts of Nitrogen. Nitrogen is the impurity that imparts the yellow color in diamonds. As a result “white” diamonds of this type tend to be colorless (D-F) colors and have few inclusions. (see GemWise: http://gemwiseblogspotcom.blogspot.com/2007/06/golconda-diamond.html)

Type IIa diamonds have unique characteristics. Stones of this type are famous for their exceptional lack of color, a color that goes beyond D and is often called super-D color.

“…the old Golconda stones were by comparison ‘whiter than white.’ Place a Golconda diamond from an old piece of jewelry alongside a modern recently cut D-color diamond, and the purity of the Golconda stone with become evident.”

Benjamin Zucker; Gems & Jewels; A Connoisseur’s Guide

Type IIa diamonds have also been found in Brazil and at South Africa’s Premier Mine. It is estimated that only about 1% of the world’s diamonds are type IIa. The auction houses tend to lump together all type IIa stones, but be warned; not all type IIa diamonds are created equal. It is not enough that a stone fits the scientific definition. A true Golconda or perhaps I should say Golconda-type gem is not only “whiter than white”, diamonds of this type have other characteristics that contribute to their unique beauty, characteristics that sets them apart from the common herd.

Gems of The Finest Water:

Prior to the invention of modern terminology, exceptionally fine diamonds were referred to as “gems of the finest water”. The “term” water goes back to at least the Seventeenth Century. Water combines two concepts; color and transparency. For the purposes of rhyming I have renamed this later quality crystal and include it along with color, clarity and cut as one of the “Four Cs of Connoisseurship”. For a gem to be truly considered fine it must have both exceptional color and crystal so “super-d” too refers to more than just the total absence of color:

“This designation (super-d), one that sounds about as romantic as a name-brand motor oil refers to antique diamonds from India’s legendary Golconda mines---stones that are reputed to exhibit an extraordinary transparency.”

Richard W. Wise; Secrets of The Gem Trade, The Connoisseur’s Guide To Precious Gemstones

The True Blue White Diamonds

Type IIa diamonds have yet another characteristic, one that is not well understood or even well known among gem professionals; under certain conditions the stones will emit a blue glow in daylight.

The mechanism that produces this phenomenon is not well understood but it is not ultra violet fluorescence. About one third of all diamonds fluoresce blue under ultra-violet light. A few of these, diamonds with very high fluorescence, will actually appear milky or foggy, i.e. lose transparency in daylight. Golconda-type IIa diamonds, rarely possess fluorescence in any meaningful degree:

In a paper presented in 1975 at the 15^th International Gemmological Conference, gemologist and author Herbert Tillander made the following observations:

“This type (type II) includes all natural blue diamonds, the only current source of which is the Premier Mine and some really blue-white stones without fluorescence.”

“Type II diamonds in general do not fluoresce although they give a bluish afterglow.”

Herbert Tillander, The Hope Diamond and its Lineage, p. 7

The problem is that the blue glow is quixotic and unreliable; Like the famous green flash at sunset that is sought, usually after a couple of Margaritas, by vacationers to the Caribbean, this phenomenon refuses to dance to the gemologist’s tune.

“Here, in the afterglow of day, we keep our rendezvous beneath the blue
And, in the same and sweet old way I fall in love again as I did then.”

Twilight Time, The Three Suns

My love affair with this curious phenomenon began at about 2:30 one sunny late June afternoon in the Berkshires. A client and I were comparing two 10 carat type IIa diamonds. Both had GIA certificates, one, a modern radiant and the second an Old European that looked like the Regent’s younger sibling. The old cut glowed blue, the modern stone just sat there.

“…the never failing test for correctly ascertaining the water is afforded by taking the stone under a leafy tree and in the green shadow one can easily detect if it is blue.” Jean-Baptiste Tavernier, 1689

The old Golconda diamonds exhibited these three characteristics, ultra-colorlessness, a high degree of transparency and, if Tavernier is to be believed, a delicate blue glow. Tavernier as quoted above bought all his diamonds in India. Given his statement it would seem to follow that in the original meaning of the term, a blue white diamond was not, as most experts believe, a blue fluorescent stone but rather a non-fluorescent Golconda diamond. (pictured left: Jean Baptiste Tavernier discoverer of the Hope Diamond)

“The Regent possesses that unique limpidity characteristic of so many of the finest Indian diamonds together with a beautiful light blue tinge.”

Ian Balfour, Famous Diamonds

Balfour gives the following description of the 135.92 carat Queen of Holland diamond (pictured left)

“Yet there are experts who, after examining it think that the ‘Queen of Holland’ is a typical Golconda stone. It has been classified as an ‘intense blue’: although it is a white diamond it does possesses a definite blue tint, rather like the colour of cigarette smoke. The Gemological Institute of America has graded the ‘Queen of Holland’ as ‘internally flawless’ and ‘D’ colour…”

Ian Balfour, Famous Diamonds

Very little of any information about Golconda diamonds exists in the current or historical literature. This explains why so few experts are aware of Golconda-type IIa diamonds and their characteristic beauty marks. Specialists that I consulted, at both Christies and Sotheby’s, were totally unaware of the phenomenon of the blue glow. Perhaps this is because, in at least some cases, this ethereal phenomenon is, as I have said, quixotic. It only appears under certain as yet indefinable conditions. It can be seen in sunlight and most gem experts, particularly those in New York, don’t get out much and when they do in the polluted haze that hangs over The City, perhaps the phenomenon is not visible at all.

Mystery Solved; A talk with Tom Moses:

This morning I spoke with Tom Moses who is GIA’s point man on grading fancy color diamonds. Finally a living person other than myself who has seen this affect. Moses is indeed familiar with the blue phenomenon which he describes as the Tyndell Effect similar to the affect that makes the sky blue. This same cause was suggested by Fancy Color diamond specialist Stephen Hofer in a conversation I had with him last week.

According to Moses, Type IIa diamonds usually do not fluoresce or if they do, the fluorescence is so weak that it is not reported on GIA’s grading reports. The blue glow is not at all characteristic of a specific location; Moses has seen it is Type IIa diamonds from South Africa, Brazil and Russia. Only a small percentage of type IIa diamonds exhibit this blue glow.

Off To Las Vegas:

Now that I have solved one mystery I'm off to solve another, that is, why would anyone want to visit Sin City. Stay tuned...

Learn The True mysteries of gems.

Follow me on gem buying adventures in the pearl farms of Tahiti. Visit the gem fields of Australia and Brazil. 120 carefully selected photographs showing examples of the highest quality gems to educate the eye, including the Rockefeller Sapphire and many more of the world's most famous gems. Consider my book: Secrets Of The Gem Trade, The Connoisseur's Guide To Precious Gemstones.

“Wise is a renowned author... He’s
done a marvelous job of this first book, monumental work, a tour de force...My recommendation: Buy this book”.

Charles Lewton-Brain, Orchid

whether you like to know what the best colour is in Tanzanite, or how to grade a Diamond, you will find it in this book. No other book I read before dealt with this topic is such detail as Richard Wise's masterpiece."

A. Van Acker, FGA
Amazon June 2005

"Secrets Of The Gem Trade: The Connoisseurs Guide To Precious Gemstones by Richard W. Wise is an impressive new reference for dedicated dealers and collectors of gems, gemstones, and ... pearls. Introducing and descriptively exploring each and every gem covered in the easy-to-use reference, Secrets Of The Gem Trade contains an illustrated summary of each stone inclusive of its history and general information, hue and tone, saturation, which may be noticed as the finest, an understanding of the particular gems rarity, and the caution for synthetics and how to depict them, however depending upon the stone there may be description of clarity, color fading, multi-color effect, etc. Secrets Of The Gem Trade is very highly recommended to anyone interested in gemology as a superbly organized, authoritative, comprehensive, and easy-to-follow reference."

Midwest Book Review
April 2006

Only $35.95. Read a couple of chapters online: www.secretsofthegemtrade.com.

Buy it on Amazon: www.amazon.com

Crisis In Paradise; Pearl Prices in Tailspin

Had an interesting conversation with Josh Humbert, Josh is the proprietor of the Kamoka Pearl Farm in the Tuamotu Islands www.kamokapearls.com , a far-flung windswept archipelago about 300 miles north of the capital island of Tahiti.

Josh’s farm is located on the atoll of Ahe located 350 miles north east of Tahiti in the Tuamotu Islands. Unlike Tahiti, which is a volcanic island, the Tuamotus are true atolls, flat ribbons of coral surrounding a large center lagoon. Conditions in this far off island group are perfect for the culturing of the Pinctada Margaritifera, the parent mollusk of the black pearl.

20% Price Drop in Small Sizes:

According to Josh, all is not well in paradise. Once more, over production has led to a crash in pearl prices at the source and many farms are in financial trouble. You may remember a similar crash in pearl prices about five or six years ago. The last time we were able to offer fine black pearl strands at bargain prices and consumers lapped them up.

Another exceptionally knowledgeable source tells me that the oversupply is mainly in the smaller 8-10mm sizes, pearls in the 11mm+ range are hard to come by and prices are actually higher. At the March GIE auction in Papeete asking prices were high and very little sold. Most lots sold privately, post auction, at prices much lower than the advertised floor prices allowing GIE to claim a successful sale. Pearls in the 8-9 and 9-10mm sizes have dropped approximately 20%.

Don’t expect to see these falling prices right away. Prices at the Las Vegas Gem Shows should reflect the prices on older stock. Unless there is a rebound, these price cuts should trickle down by this fall. Stay tuned...

Book Review

By Richard W. Wise, G.G.

©2008

Gems & Mines of Mogok

by Ted Themelis

Hardcover 352 pages

Self published 2007

For gem enthusiasts, Mogôk is the Holy Grail. This beautiful remote valley together with Afghanistan’s Sar al Sang, is the oldest continuously productive gem district on earth. If there is anything you didn’t know about the gems or geology of Mogôk that was not covered in his previous volume, Ted Themelis’ new book "Gems & Mines of Mogok" has got you covered.

Themelis’ previous book Mogôk, Valley of Rubies and Sapphires published in 2000 focused on the history, people and as the title suggests the fabulous ruby and sapphire produced in the valley. In this new book Themelis turns his attention to the Geology, Mineralogy, Crystallography and mining of the diverse gemstones and minerals found in the Mogok Valley. The book is profusely illustrated with charts and maps of tectonic models and geological models, satellite images together with topographic and geological maps.

Themelis starts right off in Chapter 1 with a comprehensive historical overview of the geology of Mogok replete with a proposed model of the tectonic evolution of the region accompanied by an imposing array of illustrations: a Timetable of Rocks and a two page color Geological map of Mogok, photographs of geological features and rocks divided by type; igneous, pegmatitic, metamorphic. In short, a geologist’s compendium coupled with a rock hound’s field guide to the region.

Most books in this category focus on ruby and sapphire, skipping lightly over the many rare and interesting gems and minerals produced in this complex geological environment. In Chapter 5, Themelis profiles and provides photographs of some sixty gem species and varieties, everything from amblygonite to zircon. In appendix D he provides a handy gemological property chart of the twenty-one most important gemstones complete with refractive index and other key identification criteria. (above right: 8513: 2.09 Natural Mogok Burmese Ruby from the R. W. Wise Collection)

There is something for everyone: For the lab gemologist, photomicrographs of inclusions and descriptions of ruby, sapphire and peridot; for the mineral collector, descriptions and images of a large number of mineral specimens by sub-regions; for the ruby-sapphire aficionado an illustrated discussion of origin determination; for the crystallographer a images and illustrations of crystal habits. Appendices cover treatments of Mogok ruby and sapphire, Burmese gem-jargon, a list of gem mines with latitude-longitude followed by a nine page bibliography.

The book is an awesome, genuine tour de force, buy it! Better still, buy both volumes for $199 and Themelis will throw in a free CD. www.themelis.com . For immediate delivery in the U. S. contact: Mr. Bill Dunn at Hypatiagem@aol.com

Take a boat ride across an exotic lagoon. Visit a black pearl farm and learn how black pearls are farmed and graded.

Follow me on gem buying adventures in the pearl farms of Tahiti. Visit the gem fields of Australia and Brazil. 120 carefully selected photographs showing examples of the highest quality gems to educate the eye, including the Rockefeller Sapphire and many more of the world's most famous gems. Consider my book: Secrets Of The Gem Trade, The Connoisseur's Guide To Precious Gemstones.

“Wise is a renowned author... He’s
done a marvelous job of this first book, monumental work, a tour de force...My recommendation: Buy this book”.

Charles Lewton-Brain, Orchid

whether you like to know what the best colour is in Tanzanite, or how to grade a Diamond, you will find it in this book. No other book I read before dealt with this topic is such detail as Richard Wise's masterpiece."

A. Van Acker, FGA
Amazon June 2005

"Secrets Of The Gem Trade: The Connoisseurs Guide To Precious Gemstones by Richard W. Wise is an impressive new reference for dedicated dealers and collectors of gems, gemstones, and ... pearls. Introducing and descriptively exploring each and every gem covered in the easy-to-use reference, Secrets Of The Gem Trade contains an illustrated summary of each stone inclusive of its history and general information, hue and tone, saturation, which may be noticed as the finest, an understanding of the particular gems rarity, and the caution for synthetics and how to depict them, however depending upon the stone there may be description of clarity, color fading, multi-color effect, etc. Secrets Of The Gem Trade is very highly recommended to anyone interested in gemology as a superbly organized, authoritative, comprehensive, and easy-to-follow reference."

Midwest Book Review
April 2006

Only $35.95. Read a couple of chapters online: www.secretsofthegemtrade.com.

Buy it on Amazon: www.amazon.com

Rough Roulette; Colombian Emerald Part II

By Richard W. Wise, G.G.

©2007

"Round and round she goes and where she stops, nobody knows."

I have heard it said that each time you put an emerald on the wheel the chances of breaking the stone are about 50/50. I recall one hot and dusty afternoon in the late 1980s I was sitting with some friends at a cafe in Teofilo Otoni, a town which was, at that time, the gemstone capital of Brazil. A ragged looking garempiero rode by on a motorbike, turned around and rode back to the cafe. He knew my friend, a Brazilian cutter, so he pulled a dirty scap of cloth from his shirt pocket and let us have a look. The cloth contained an emerald crystal from the mines ant Santa Terezinha de Goiás. The miner had rode all through the night to bring his find to Teofilo. During the 80s Goiás produced emerald that rivaled some of the better gems Colombia had to offer. (pictured left: Entrance to the shaft at La Pita Emerald Mine. Guacharos wait for the tailings. Photo Richard W. Wise)

The perfectly formed hexagonal crystal showed a verdant medium-dark green color that looked exceptionally fine. I don't recall the actual weight (somewhere in the 25 carat range) but the crystal was about the size of my index finger. This crystal lacked the jewel-like transparency of the Colombian crystals pictured in Part I and was difficult to evaluate. I could see the pepper like inclusions typical of of Goiás emerald but little else.

The asking price of the Brazilian crystal was a quarter of a million dollars. Long story short, I didn't make an offer. I thought the crystal lacked the transparency necessary to evaluate it and I wasn't prepared for a quarter of a million dollar spin of the wheel. I later heard that the crystal had been sold for something close to the asking price and that when it was put on the wheel it had literally exploded leaving the buyer with nothing to show for his purchase.

High Rollers:

Hurry, hurry, hurry and welcome to the high stakes world of the rough buyer where every parcel is a gambol. In this world, where a single bet may exceed a million dollars, the dealer across the table from me is a high roller. The parcel so casually scattered across the desk in front of me is a big time rise. Perhaps 1400 carats, it is from the new mine, La Pita, a complex of adjacent shafts in the Colombian state of Boyaca. One mine actually bears the name La Pita, the others are Consorcio, Cunas, Totumos and Polveros. In a country where the old mines have been producing since before the Conquistadors conquered their local owners in the mid Sixteenth Century, serious commercial mining only began at La Pita in 1997. (Pictured left: the author works his way through a half mile tunnel to the surface. Foreground, miner pushes cart full of mine tailings, these will be given to guacheros waiting at mine entrance for further sorting: Photo: Ron Ringsrud)

We are about to watch the fashioning of two of these crystals into gemstones. In this high stakes world a dealer needs an edge. Having a lapidary with the skill of Adolpho Argotty is just such an edge. According to Argotty, in his workshop, loss on the cutting wheel is perhaps 4% and that is perhaps why Argotty is rated the best. He is presently traiing the second generaltion, his niece, Fernanda, who sits at a wheel at his side (see image above right).

Argotty doesn’t just pre-form the stone he supervises the entire process:

“Would you ask an architect to just put up the bones of a structure and let others finish it?” he asks.

(images: above: Adolpho Argotty, holds forth: Picture Richard W. Wise) It takes just about a half an hour. Argotty works away the emerald held between his thumb and forefinger. He grinds a bit then holds the stone up and squints at it in the sunlight all the time carrying on an animated conversation in Spanish with my partner Ron Ringsrud. Ron loves Colombia. He deals exclusively in Colombian Emeralds, has been coming to Bogotá for twenty-five years and speaks fluent Spanish.

The workshop is surrounded by windows on three sides. The light is good. The two crystals have been blocked out, that is to say, they are now the size and shape of the finished gem. Argotty decided to cut the best crystal into a standard rectangular emerald cut. The stone started out at 7.17 carats it now weighs 4.77 carats and it is ready for the faceting wheel. Argotty is excited about this gem. He hands it to Maria Fernanda to polish the table, he wants a closer look.

She hands it back.

"This one", he says, "will be worth at least $10,000 per carat."

The second stone which began at 8.53 carats has been shaped into what Argotty is calling a rose cut. I am confused because the stone obviously has a pavilion and looks very much like an antique style emerald cut with overly large corners. Later we figure out the problem is in translation, Argotty means an old style cut which this stone obviously is. Even before polishing commences we see visible inclusions in the stone. It now weighs 6.44 carats.

Step #1 Sealing & Certification:

In Adolpho Argotty's workshop, preformed stones are dipped into hot paraffin. The objective is to seal any surface breaking fissures to insure that no residue of the polishing compound makes its way inside the stone.

Colombian cutters become a bit testy when the subject of lab grading is raised. If you love emerald you must be prepared to accept some surface breaking fissures and yes, cedar oil is universally used as a treatment to hide these fissures. However, both dealers and cutters feel that they are getting a bad rap from some American and European Gem Labs. Most labs use a uniform four step grading process to grade the level of enhancement: none, minor, moderate and heavy. Gubelin adds insignificant between none and minor and AGL (American Gemological Laboratories) uses its own proprietary scale. Columbian Esmeraldaros believe that this system lacks consistency. The labs, they contend, are afraid to use the term none. According to Argotty, he has delivered emeralds that he personally cut and knows to be totally without enhancement, to major European labs which in turned issued reports claiming these emerald contained a filler. The reader should bear in mind that a certificate grade of none is in no sense a clarity grade,the stone can still look like a broken coke bottle. It just contains no filler, no clarity enhancement.

I examined hundreds of finer stones in the course of my week in the Bogata market and with but a single exception, every stone I saw had some surface breaking fissures. Taking Ron Ringsrud's advise I rejected any stone with fissures on the crown or girdle or those with fissures on the pavilion that I felt might n anyway compromised the durability of the stone. This, by the way, would make a good definition of the term minor enhancement.

Next, Dopping, Faceting and Polishing. Stay Tuned.

Learn the truth about how Emeralds and other fine gems are graded and priced!

Follow me on gem buying adventures in the pearl farms of Tahiti. Visit the gem fields of Australia and Brazil. 120 carefully selected photographs showing examples of the highest quality gems to educate the eye, including the Rockefeller Sapphire and many more of the world's most famous gems. Consider my book: Secrets Of The Gem Trade, The Connoisseur's Guide To Precious Gemstones.

“Wise is a renowned author... He’s
done a marvelous job of this first book, monumental work, a tour de force...My recommendation: Buy this book”.

Charles Lewton-Brain, Orchid

whether you like to know what the best colour is in Tanzanite, or how to grade a Diamond, you will find it in this book. No other book I read before dealt with this topic is such detail as Richard Wise's masterpiece."

A. Van Acker, FGA
Amazon June 2005

"Secrets Of The Gem Trade: The Connoisseurs Guide To Precious Gemstones by Richard W. Wise is an impressive new reference for dedicated dealers and collectors of gems, gemstones, and ... pearls. Introducing and descriptively exploring each and every gem covered in the easy-to-use reference, Secrets Of The Gem Trade contains an illustrated summary of each stone inclusive of its history and general information, hue and tone, saturation, which may be noticed as the finest, an understanding of the particular gems rarity, and the caution for synthetics and how to depict them, however depending upon the stone there may be description of clarity, color fading, multi-color effect, etc. Secrets Of The Gem Trade is very highly recommended to anyone interested in gemology as a superbly organized, authoritative, comprehensive, and easy-to-follow reference."

Midwest Book Review
April 2006

Only $31.95. Read a couple of chapters online: www.secretsofthegemtrade.com.

Buy it on Amazon: www.amazon.com

"Asking to see the Pigeon's blood is like asking to see the face of God"

About once a month on one of the gem forums someone asks the question:

"What color is pigeon's blood."

by Richard W. Wise, G.G.

©2007

The real question is, of course, "what is the best color in ruby." Although I cover the question in some depth in my book; Secrets of The Gem Trade, The Connoisseur's Guide to Precious Gemstones, it appears that a few people have yet to read the book. (pictured above a gem quality 2.09 carat natural old mine Burma ruby with a GRS "pigeon's blood certificate)

The short answer is simply that rubies should be red. Problem is there are almost no visually pure color in nature so, we speak of a mixture of colors. In gems, we normally speak of a primary and a secondary color or hue. Gems may have more than two hues but it it is difficult for even the most discerning connoisseur to see more than two. Still a ruby must be predominantly red, that is, have a primary red hue. Put another way in the color mix, red must be at least 51% of the hue mixture. If its not red its not a ruby. Any member of the gem family corundum that is any color other than red we call sapphire.

Ruby may exhibit one of a few possible secondary hues. These are: pink, purple and orange. Purple and orange are the hues immediately adjacent to red on the color wheel. You will never find a ruby with a green secondary hue. Pink, a paler less saturated red is also possible. The finest color or pigeon's blood exhibits a purple secondary hue. Why purple, there are two good reasons; one historical and the other based upon color science.

This historical explanation I owe to Vincent Pardieu. Vincent began by studying gemology in Burma and he found a dealer who explained "pigeon blood" to him. The Burmese coined the term. Purple is a hue that falls between blue and red on the color wheel. It is known scientifically as a modified spectral hue. The Burmese set gems in pure gold which is a a very rich yellow color. Blue is the compliment of red. Complimentary colors are those that cancel each other out. So when a purplish red ruby is set in yellow, the yellow of the metal cancels out the blue in the purple leaving behind, guess what an almost visually pure red.(pictured above a 1.63 carat gem quality old mine Burma ruby with a GRS "pigeon's blood certificate). So the goal for the Burmese is red, pure red! See more!

I wrote my book several years before I met Vincent in Bangkok. However, I reached the same conclusion by applying a logical analysis. My reasoning goes something like this. Color Science teaches that the color red reaches its optimum saturation (brightness) at a fairly dark tone, somewhere about 80%. This is not opinion, it is measurable scientific fact. If you consider that 100% tone would be pure black, 80% is pretty dark. Pink and orange on the other hand reach their optimum saturation at fairly light tones. Pink obviously as it is by definition paler (less bright). Orange reaches its optimum saturation at between 30-40% tone.

Purple reaches its optimum saturation at around 60% tone. Now, if you add a light pigment to a dark paint you would obviously lighten the overall effect. Same is true in transparent media. The optimum tones of red and purple mix fairly well both being both dark in tone. The purple unlike the pink does not dilute the red. Pink and orange would lighten the red thus reducing the overall saturation of the pinkish-red or orangy-red color. Purple reinforces the red, orange and pink dilute. Make sense? Not everyone agrees. Some connoisseurs like a bit or orange. They feel it frames and pumps up the red hue. A good point if you consider the effect of orange in red spinel. Be that as it may, for good historical as well as scientifically verifiable reasons, orangy red is not pigeon's blood.

The first image above is of a 2.09 carat Burmese natural ruby from the old min at Mogok. This stone has a bit purer red, exhibits less purple than the second stone, a 1.63 carat gem from the same mining area. Both, however, have been grading "Pigeon's blood" by GRS, Swiss Lab, Bangkok. As you might imagine this lab sees an awful lot of rubies. Both stones are from the Mogok Valley, this is the place, going back to the Bronze Age, where the original stones were mined back when the term pigeon's blood was coined. A lot of the gems currently in the market are from a new mining areas Mong Hsu that is about half way between Mogok and the Thai border. Mong Hsu stones can certainly be pigeon's blood color but since we are talking about a historical term I thought it best to use illustrations from the old mine.

By the way if you are looking for the ultimate Christmas present, both these gems are available for sale.

Want to Learn more?

Follow me on gem buying adventures to the old Burma ruby mine at Mogok. Learn how to judge the quality of rubies, sapphires, emeralds, garnets and 31 other gems. 120 carefully selected photographs showing examples of the highest quality gems to educate the eye, including the Rockefeller Sapphire and many more of the world's most famous gems. Consider my book: Secrets Of The Gem Trade, The Connoisseur's Guide To Precious Gemstones.

“Wise is a renowned author... He’s
done a marvelous job of this first book, monumental work, a tour de force...My recommendation: Buy this book”.

Charles Lewton-Brain, Orchid

whether you like to know what the best colour is in Tanzanite, or how to grade a Diamond, you will find it in this book. No other book I read before dealt with this topic is such detail as Richard Wise's masterpiece."

A. Van Acker, FGA
Amazon June 2005

"Secrets Of The Gem Trade: The Connoisseurs Guide To Precious Gemstones by Richard W. Wise is an impressive new reference for dedicated dealers and collectors of gems, gemstones, and ... pearls. Introducing and descriptively exploring each and every gem covered in the easy-to-use reference, Secrets Of The Gem Trade contains an illustrated summary of each stone inclusive of its history and general information, hue and tone, saturation, which may be noticed as the finest, an understanding of the particular gems rarity, and the caution for synthetics and how to depict them, however depending upon the stone there may be description of clarity, color fading, multi-color effect, etc. Secrets Of The Gem Trade is very highly recommended to anyone interested in gemology as a superbly organized, authoritative, comprehensive, and easy-to-follow reference."

Midwest Book Review
April 2006

Now 20% off. Read a couple of chapters online or buy one of the few remaining limited editons: www.secretsofthegemtrade.com.

Buy it on Amazon: www.amazon.com

Gem Prices follow Real Estate in the New Gilded Age

Gem Prices in The New Gilded Age

By Richard W. Wise, G.G.

©2007

Gem prices are definitely on the rise. However, these price increases seem to be following general market trends that is, the largest price increasing have been at the very upper end of the market while commercial qualities have remained more or less static. This compares almost exactly to the situation in the U. S. real-estate market.

From Florida’s Miami Beach to The Berkshires of Massachusetts, homes in the under 1 million price range are languishing on the market while homes priced in the one million plus category find ready buyers. In a recent article the New York Times it is reported that condos priced at a median price of 1 million in the Miami area have slipped slightly while those at the 1.5 million level have actually seen a slight increase. In the upscale Berkshire Mountains of Massachusetts the story repeats itself. Prices on single family homes below 1 million are not selling while the market for 1 million plus homes is described as brisk.

Likewise, Prices for fine quality Black opal have doubled in three years and prices for ruby, particularly the very rare fine unheated stones has risen 60%. Due to a diversity of sources, prices for unenhanced fine blue sapphire, the most popular colored gemstone in the U. S. is up a paltry 20%.

Some of this increase is due to the weak dollar which is down 40% against the Australian dollar, 20% against the baht and 22% against the Columbian peso. This has made U. S. real estate relatively cheap for foreign buyers. Since the international gem market operates mainly in dollars the effect has been similar.

As we move toward the low-end, gem prices have hardly moved at all. The bread and butter market is in the doldrums, commercial to good qualities have hardly moved upward at all. In fact, the entire low to mid range jewelry industry is experiencing something of a recession.

I Get Letters:

Seems like I get at least one question like this every week:

Judy from Melbourne writes:

Hello,

Thank you for your site and all your wonderful articles and books.
I wonder if you can help with how to appraise a very unusual stone my partner is thinking of buying. It is a 66ct peridot, loupe clean, square step cut with a deep pavilion, very dark green (but not olive) with almost no yellow, evenly saturated, and bought in Burma from the Burmese owner of a small mine.

The price being asked is around...(removed)...Appraisers here in Melbourne have never seen a similar stone, and say they have no benchmark for it, but it has been suggested that collectors might pay substantially more than the price being asked.

I would very much appreciate any guidance you can give me.

Answer:

Like Antiques Road Show in braille.

Judi,

How does one answer such a question without seeing the stone. I get quite a few similar emails so, if you don't mind I will post the question and answer on my blog. This reminds me of a call in program occasionally run on our local radio station, WAMC. Two antique dealers are asked to value items described by the callers. They never actually see the item but that fact does not seem to get in their way. Its like Antiques Road Show in braille.

One of a kind stones, big stones are difficult to appraise even when they are in front of you. Is there a peridot worth that price, certainly! Based on a respected price list, the top retail price for Peridot in that size would be $360 per carat. for an extra fine gem. Is your stone worth that much? I really have no idea. The best one I ever saw had an asking price of $5,000 per carat. You say its not olive meaning no gray mask? The depth of color (saturation, tone, crystal and the quality of the cut would be the remaining key factors.

My best advise: Show it to someone who knows. In lieu of that, its anybody's guess

Whats a buyer to do?

Follow me on gem buying adventures in the pearl farms of Tahiti. Visit the gem fields of Australia and Brazil. 120 carefully selected photographs showing examples of the highest quality gems to educate the eye, including the Rockefeller Sapphire and many more of the world's most famous gems. Consider my book: Secrets Of The Gem Trade, The Connoisseur's Guide To Precious Gemstones.

“Wise is a renowned author... He’s
done a marvelous job of this first book, monumental work, a tour de force...My recommendation: Buy this book”.

Charles Lewton-Brain, Orchid

whether you like to know what the best colour is in Tanzanite, or how to grade a Diamond, you will find it in this book. No other book I read before dealt with this topic is such detail as Richard Wise's masterpiece."

A. Van Acker, FGA
Amazon June 2005

"Secrets Of The Gem Trade: The Connoisseurs Guide To Precious Gemstones by Richard W. Wise is an impressive new reference for dedicated dealers and collectors of gems, gemstones, and ... pearls. Introducing and descriptively exploring each and every gem covered in the easy-to-use reference, Secrets Of The Gem Trade contains an illustrated summary of each stone inclusive of its history and general information, hue and tone, saturation, which may be noticed as the finest, an understanding of the particular gems rarity, and the caution for synthetics and how to depict them, however depending upon the stone there may be description of clarity, color fading, multi-color effect, etc. Secrets Of The Gem Trade is very highly recommended to anyone interested in gemology as a superbly organized, authoritative, comprehensive, and easy-to-follow reference."

Midwest Book Review
April 2006

Only $37.95. Read a couple of chapters online: www.secretsofthegemtrade.com.

Buy it on Amazon: www.amazon.com

Gem Collecting for Fun and Profit

Collector’s Corner; How and What to Buy

© 2007

Everybody wants a steal, 'er, deal:

I get a lot of emails from my readers with various questions. Friday I got a call from Diane, she read the book and wanted to know what stones a budding collector should be looking at. Now, when most people ask me that question what they really mean to ask is “what is available and cheap.” Why not, everybody wants a deal. Thing is in gemstones there are two kinds of deals.

As a collector you should be looking for the fine and the rare. Fact is, in gemstones just about everything that is fine is, in fact, rare, the finer it is the rarer. I like to use the example of amethyst. Amethyst is quartz which, geologists tell us makes up almost 26% of the earth’s total bulk. So quartz isn’t particularly rare but, a beautiful transparent deep purple quartz that exhibits red scintillation in incandescent light is extremely rare. (Image above: #6999: 15.06 carat custom cut Deep Siberian Amethyst)

You can buy amethyst for between $1.00-100.00 per carat, quite a price spread but you will probably pay $50-100 per carat for a #1 color “deep Siberian” amethyst described above depending upon size, clarity, crystal and cut. You can buy #2 color, a beautiful deep purple amethyst that does not exhibit the requisite red flash for maybe $20-$35 per carat. Given the fact that #1 color is hundreds of times rarer and perhaps three times the price, you figure it out.

What’s hot, what’s not:

In Secrets Of The Gem Trade I write about something that might be called the Gemstone Market Price Cycle or (GMPC) (love those acronyms) The cycle works like this: When a new gem or a new source of an existing gemstone is found, the new material floods into the market increasing availability and decreasing price. Gems, other than diamonds, normally occur in fairly small pockets so the flood doesn’t last long. What does happen is the increased availability stimulates interest which translates into market demand. As demand increases the material begins to run out and as supply decreases, prices increase. By the time the dust clears the market price is higher than before the new material was found. (Image above: #6064: 6.93 carat Nigerian Spessartite Garnet)

Recently we have seen this happen with several gemstones. Consider spessartite garnet, the 4th most brilliant gemstone. A decade ago, most jewelers had never seen a spessartite never mind the hot tangerine orange gems available in the market today. Most fine spessartite came from one source; The Little Three Mine in Ramona California. This material was extremely rare in the marketplace and sold for fairly high prices. One knowledgeable dealer told me that the total production from Little Three was probably on the order of 10,000 carats. There was simply not enough spessartite to make a market which gives rise to the paradox that if its so rare that no one knows about it, there is no demand. (Image right:#8084: 9.51 carat Nigerian Spessartite Garnet)

Enter the Nigerian find: All of a sudden there are Nigerian dealers all over Tucson with plastic bags full of juicy fruit orange rough. There is high quality spessartite everywhere and was it cheap. I remember selling 5+ carat extra-fine pure tangerine orange gems to collectors for $275-300 per carat. In the six years or so since the Nigerian strike the GMPC has played out; demand has increased, supply has decreased and prices have doubled. Prices now are higher then they were before the strike when the stone was a good deal rarer.

Of course this all took place BGT, Before 24 hour Gemstone Television really took hold back in the good old days when the free market was still alive and well. No one successfully had cornered any gem deposit and there was little if any hype to distort natural market forces. The effect of the shopping channels can be gauged by looking at Andesine, a form of sunstone that has become the darling of gemstone TV and is being sold by the shovel full to the unsuspecting at ridiculous prices.

Strategic Collecting:

So what’s a collector to do? Fact is the GMPC is still valid so long as y’all keep a jaundiced eye on gem TV. Two stones, spessartite and Peridot, particularly the material from Pakistan that began to trickle into the market in 1995 are still on the downside of the cycle, and, in my opinion, available in fine quality at reasonable prices. As for Spessartite, buy the high grade light-medium tone (30-40%) pure vivid orange to cinnamon orange. Remember once you go beyond medium tone, orange becomes brown and that is to be avoided.

Pakistan Peridot:

At its best, material from this source sports a medium grassy green primary hue. The best will read as as a strong medium toned green with just a touch of yellow and beware the gray mask. Pakistan Peridot will stand toe to toe with the best Burmese and is far superior in both size and color to the stones from the traditional Arizona source. Stones are eye-flawless and readily available in 5-10 carat and even larger sizes. (Image above: #7033: 8.09 carat Custom cut Pakistan peridot)

The rough material is getting scarcer and there is upward pressure on prices which are beginning to be felt in cut gemstone market. Peridot also has built in demand, it is also the traditional August birthstone. Every summer I have August babies come into my gallery, see cut stones from this source and fall in love.

My recommendation: buy Spessartite and Peridot and buy only the best. And, just three words of caution to those of you who think that you that you can steal a fine gemstone on Thai websites, Fleabay or Gem TV, get over it! I recall one client, I think he was a Dentist, after I told him a story of one of my trips to Burma asked me, "but do they know what they have?" The Burmese have been digging ruby since the Bronze Age. Gems are one of the world's oldest articles of trade. Fine gems made their way from Afghanistan to to ancient Sumer as early as 2000 B.C. With all that history, do you really believe these folks haven't figured it out? Take my advice: If it sounds like too good to be true, it is too good to be true!


Book Review

Extra-Lapis #10: Opal, The Phenomenal Gemstone

by Richard W. Wise
© 2007

It just arrived, my latest Extra-Lapis, this one #10 entitled; Opal, The Phenomenal Gemstone. For those of you who don’t know, Lithographie, LLC of East Hampton, Connecticut www.lithographie.org. publishes an English version of the famous German gem/mineral magazine Extra-Lapis. In the past few years monographs in this series have focused on gold, tourmaline and emerald along with numbers dedicated to important gem/mineral locations such as Madagascar and Pakistan and occasional forays in to mineral kingdom with issues on fluorite and calcite.

Extra-Lapis #10 is the latest word on opal. It includes articles on all the current producing areas as well as historically important locations both major and minor. The latest theories on what causes those tiny little silica spheres that create play-of-color to do the thing they do and much more.

Great writers too: The great husband and wife writing team Si and Ann Fraser kick the issue off with an overview of opal’s history as a gemstone. Much of this information is old hat but well organized and presented and include the intriguing assertion that Mexican opal was certainly known and valued by the Mayans and Aztecs and that, despite Pliny’s famous description, opal may not have been known by the Romans at all. In other articles; Veteran dealer Andrew Cody provides an overview of sources in South Australia, Elizabeth Smith, author of Black Opal Fossils of Lightning Ridge contributed an excellent piece on current conditions and mining at “The Ridge” including a scrumptious photo essay on black opal nobbies.

Other articles provide beautifully illustrated history and updates on diverse sources such as Slovakia, White Cliffs, Queensland, Virgin Valley, Honduras and Ethiopia. There is a map of worldwide opal locations, an interesting but incomplete glossary of opal terms. What is missing is a good bibliography and a solid discussion of opal classification and quality grading.

This latest 112 page offering is, like all the others, beautifully made and wonderfully illustrated. The editors go to great expense: Each softbound issue is printed on heavy chrome coat, printing and image reproduction is of the highest possible quality.

Extra-Lapis #10 is highly recommended to anyone interested in gemstones and is a must have for opal enthusiasts. The price is for #10 is $30.00 for a single issue but if you will take my advice buy a four issue subscription for $90.00.

Interested in reading more about real life adventures and secrets of the gem trade? Follow me on gem buying adventures in the exotic entrepots of Burma and East Africa. Visit the gem fields of Austrailia and Brazil. 120 photographs including some of the world's most famous gems. Consider my book: Secrets Of The Gem Trade, The Connoisseur's Guide To Precious Gemstones.

“Wise is a renowned author... He’s
done a marvelous job of this first book, monumental work, a tour de force...My recommendation: Buy this book”.

Charles Lewton-Brain, Orchid

Only $39.95. You can read a couple of chapters online: www.secretsofthegemtrade.com.

Buy it on Amazon: www.amazon.com