Showing posts with label hand construction. Show all posts
Showing posts with label hand construction. Show all posts

Friday, July 11, 2008

The Making of a Masterpiece III
























by Richard W. Wise, G.G.

© 2008


Part of the genius of a true artist consists in his ability to transform the mundane into the beautiful. Gem sculptor Tom Munsteiner did just that with this 29.73 carat chunk of citrine quartz. I fell in love with the design and purchased the stone from Tom two years ago. Not having a plan, it sat in my stone box for a year and a half.

Michael Corneau, our lead goldsmith, is a self taught craftsman. He is fascinated with jewelry, but his academic background is in interior and architectural design. He admires the clean moderne lines of the Constructivist tradition as does Tom Munsteiner.

Sculpture cutting had its beginnings in the late 1930s. Metalsmith Margaret De Patta working under the influence of the Constructivist artist Lazlo Moholy-Nagy in collaboration with San Francisco gem cutter Francis J. Sperisen produced the first gem sculptures. Not much happened after these early efforts until the German lapidary artist Berndt Munsteiner, Tom’s father, began cutting asymmetrical gems from high quality tourmaline and garnet rough. Unlike the earlier work, (labeled Opticuts by De Patta), were designed to create an optical fun house effect, reshaping, distorting and creating a sense of movement. (Pictured below, gold brooch by Margaret De Patta set with a Sperisen double lens cut quartz. The stone was purposely cut as a lens to create a distorted and dynamic image which moves and changes shape as the wearer moves. Photo Courtesy: The Dukoff Collection)

Munsteiner paid more attention to the optical qualities inherent in the gem material itself. He created gem sculptures which were alive with brilliance and scintillation. Tom Munsteiner has followed in his father's footstep though his style tends toward a simplified technical vocabulary that stresses the holographic as opposed to the senior Munsteiner's reliance on visual pyrotechnics.

Mike loved the stone.

"Munsteiner’s work is proud, independent and arrogant", he said.

"Take a shot at a design", I said.

Well Mike kept the stone in his box for a couple of months and one day knocked on my office door with a sketch of a pin/pendant. I thought it was an excellent design that integrated the gemstone into a wearable work of art. Somewhere along the line an accent was need. We went back to the stone box and found a beautiful round red Oregon sunstone that melded perfectly with the citrine and gold.

It is interesting how a design conceived in 2008, inspired and influenced by a gem cut in the Constructivist tradition, can produce a concept for a finished piece that sits four square in the same tradition.


Development of a Concept:

Michael began by making a series of models. This is time consuming, but it is fairly standard practice and it us useful to work out technical details before turning to gold. (Picture: below right, 1st on left: a simple cardboard model of the main shape, the second third and fourth models are made of sterling silver. The last model on the right shows the gemstones set roughly in place.) The chief technical problem involved working out the line of the fold in the metal with the edge of the quartz gem sculpture and working out the position of the accent stone. Given the isometric shape of the gem sculpture, this was not easy. The design is subtle and Mike also wanted to get an initial sense of the sort of finish to be used; matte, sanded or perhaps sandblasted.


The Making:

The piece would be hand-fabricated. For those unfamiliar with the method, this is how a true "handmade" piece is actually made. The material is gold sheet, forged, cut and joined. This is quite different from the lost wax process that is used in almost all commercial jewelry. Using wax, It would be impossible to achieve the even lines, crisp edges and sharp angles required and, weight would be a problem in a cast piece.

The hand fabrication begins with rolling gold sheet into the desired thickness and constructing the setting for the stone. The major joining method is soldering. Goldsmiths methods and tools have not changed awfully much over the millenia. Paintings going back 4,000 years, found on the wall of an Egyptian pyramid depict craftsmen using hand tools that can still be found on the goldsmith's workbench.

The laser welder, a tool developed about fifteen years ago, is, perhaps the most important modern edition to the goldsmith's toolbox. This is an expensive machine, but it does permit the craftsman to do pinpoint cold-joining as opposed to soldering which is hot-joining. Laser technology is particularly useful when working close to heat sensitive materials like gemstones. (Pictured right: sections of the piece. In the center is the setting for the sculpture, the main shape is to the left. Note the hole. The sunstone will be invisibly "Gypsy set" from underneath so no setting will be visible.)

Voila; Finished:

Michael decided on a sandblast finish. A good choice. It is restrained and subtle and highlights the details of the work and allows the gemstones to show their full potential.

We decided to maximize the versatility of the piece by making it wearable as either a brooch or a pendant. When used as a brooch, the double pin back is very secure. It allows the wearer to place (pin) the brooch at any angle and on thick as well as thinner fabrics, without tearing the fabric. It will also stabilize the piece when it is worn as a pendant. The pendant bail is placed between the double stems. Specifications: Item #9064LPMS 7.5-2.5cm. (2.75"x1"). 18k gold, Citrene 29.73 carats, sunstone 1.10 carats. Price: $8,995.00. For more information: 800.773.0249 (in the U.S.) or email: richard@rwwise.com
























Interested in learning more about the connoisseurship of fine gemstones? Read the book that appraisers, dealers and jewelers rely upon. Secrets of The Gem Trade will provide you with the tools you need to understand and appreciate fine gemstones. Learn the true grading criteria for diamonds, pearls, garnets, ruby, sapphire and opal. All of today's most "precious gemstones".

Read a free chapter online at the Secrets website: or just order it for $35.95 on from Amazon.com

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


Thursday, March 13, 2008

The Making of a Masterpiece II


From our workshops:

©2008

By Richard W. Wise, G.G.

Its been a long cold winter in the Berkshires. The tourists are gone and the snowbirds have flown south. During the winter months we have the peace and quiet required to think about converting some of the gem treasures we have acquired on various buying trips into beautiful hand-made originals.

The Gem:

One of our newer acquisitions is this exceptional gem from the opal fields of Queensland, Australia. The area that produces these impressive gems is deep in the Australian outback about 125 km. along a dirt track west of the town of Winton, a sleepy agricultural community about 500 miles into the arid Queensland interior. This entire region was once part of a huge inland sea. The only source of water is from artesian wells dug 2,000 feet down into the iron rich clay--and it comes to the surface hot and stinking of sulfur. During my last visit, daytime temperatures reached as high as 120 degrees.

Boulder Opal:

Boulder opal is a distinct type of opal that occurs in seams found in the native ironstone. This particular stone, like many boulder gems, has an uneven hilly surface and sports a confetti like pattern of predominantly deep green and blue play-of-color along with accents of red and orange. The dominant green is reminiscent of the color of emerald and imperial jade but is more vivid and the blue hue is deep and as velvety as the finest sapphire.

Tsavorite, The Colors of Africa:

As luck would have it I had recently purchased a parcel of lovely Kelly green 2.5 mm round tsavorite garnets. When working with opal, It is very difficult to find accent gems that work with the rich opal hues but with this parcel of tsavorites the simpatico was immediate.

Tsavorite Garnet was discovered in the 1960s in East Africa in an area near the Kenya-Tanzania border. One of the hard garnets, tsavorite is colored green by minute trace elements of chromium and Vanadium the same rare combination that is responsible for the color of fine emerald.

Tsavorite, however, has a higher refractive index and much greater dispersion giving the stone a crisp pyrotechnic brilliance quite different from the velvety sparkle of emerald. (image right, 8806: 1.41 carat oval tsavorite garnet custom cut oval from our collection.)

The Design:

I showed the opal to Spectrum Award winning artist Laurie Donovan. Laurie has an affinity for opal and when she saw the stone the light in her eyes told me that she was the right artist to work with this gem. She immediately set to work on a design.

Laurie's naturalistic design plays off the uneven surface and opal's random color pattern. (sketch pictured above, Dark circles indicate placement of round 2.5 mm tsavorite garnets) Her sensitive design emphasized the opal's free-form shape---surrounding the gem with an undulating frame of reticulated 18k gold to emphasize the contours of the center stone. The accent stones, tsavorites and small ideal cut diamonds, would be bezel set and placed in a seemingly random fashion to frame and reinforce the opal's predominate green play-of-color.

The image (below) shows the constructed setting with the center stone in place prior to mounting the accent stones. The accent stones have been placed on the sketch. All components hand fabricated in 18k yellow gold excepting the D-E color diamonds that are set in 18k palladium-white gold tubes.

The Finished Piece:

Pictured (above) is the finished brooch. The piece is built in a series of layers. The reticulated (textured) metal forms a frame from the peak and along the left and right sides of the center stone. (click image to enlarge) At the bottom is a long narrow section of highly polished gold that overlaps the reticulation. On the reverse is a double pin (pictured below right). In this view the complexity of the construction can be seen and appreciated.


Looking at the back or obverse of the jewel (pictured right) it can be seen that the piece was constructed with the utmost versatility in mind. It may also be worn as a pendant or over a pearl necklace. The double pin stem acts as a safety by locking down the bail when the piece is worn on a chain or over a pearl stand.

For further information contact R. W.Wise, Goldsmiths. 413.637.1589, or email: richard@rwwise.com.









Learn the truth about buying and grading fine gemstones!

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 $39.95. Read a couple of chapters online: www.secretsofthegemtrade.com.

Buy it on Amazon: www.amazon.com