Category Archives: Fancy Vivid Yellow Diamonds

The Golconda Diamond

Golconda Diamond

by Richard W. Wise

© 2007

Just the other day one of my readers emailed a question about Golconda diamonds. A search of the literature reveals a great deal of uncertainty about the exact meaning of the term. The source of some of the confusion can be traced to the fact that the term Golconda diamond, like many another bandied about by diamond dealers and auction houses has more than one definition; this one appears to have two; one geographic the other varietal.

Definition 1:

Until the year 1725, when diamonds were discovered in the Brazilian state of Minas Gerais, most of the world’s diamonds came from India. A group of mines concentrated around the Krishna River in the Kingdom of Golconda, located in the modern Indian state of Andhra Pradesh, were one major source of Indian diamonds. A majority of the diamonds mined were subsequently sold in the City of Golconda which became a major trading center. Several of the major mines, including Rammalakota and Kollur are mentioned by the famous Seventeenth Century French gem merchant Jean-Baptiste Tavernier as being a source of high quality diamonds.

Thus, our first definition: A Golconda diamond is a diamond from a specific geographic area within the historic Kingdom of Golconda.

Tavernier was one of the first connoisseurs to notice that diamonds from these mines were often exceptionally transparent and describes the best of the stones as” gems of the finest water.” The four criteria for evaluating any gemstone are: Color, Cut, Clarity and Crystal. These are what I refer to in my book, Secrets Of The Gem Trade, as “the Four Cs of Connoisseurship.” The term “water” combines two of the four, color and crystal. Color in diamond refers to relative colorlessness, a diamond graded “D” the highest grade, is a diamond totally without any trace of yellow. Crystal is the synonym for transparency that I have chosen to describe the fourth C of connoisseurship. I chose it because of its connotation (clear as crystal) and because it starts with the letter C and rhymes with the other three and is easily remembered.

Modern scientific analysis has shown that many famous high quality diamonds such as the Cullinan, Regent (image: at top of page) and The Koh-I-Noor that can be proven to come from the Golconda area are of a specific type of rare, almost pure diamond known as Type IIa. Less than 1% of the world’s diamonds are Type IIa. Scientifically speaking, Type IIa diamonds are diamonds that conduct electricity and contain no significant amount of nitrogen in the diamond crystal lattice.

Nitrogen is the impurity in diamond that imparts the yellowish hue. The lack of yellow makes for a pure colorless (D,E,F) color diamond. For some unknown reason, possibly plastic deformation of the crystal or unknown color centers, some type IIa diamond have yellowish, brownish or even pink body color. Some experts claim that all Golconda diamonds are Type IIa. There is, as far as I know, no scientific evidence to back up that claim.

Definition 2:

Science has not explained the exceptionally degree of transparency found in many Golconda stones. Some Type IIa diamonds also exhibit exceptional transparency or crystal. It may have something to do with the purity of the carbon crystal lattice. Type IIa diamonds are highly transparent in shortwave ultraviolet light.

The visible attribute is variously described as “clear as a mountain stream”, “whiter than white” and “super-d”. Some of these terms are misleading what we are talking about is super-crystal.

Transparency is more important in gems that are poorly cut. In India, then as now, good proportions took a backseat to size and weight. The French Blue, the type IIb gem that eventually became the Hope Diamond was originally 112 carats. Five years after Tavernier sold the stone to Louis XIV, Pitau the king’s diamond expert recut the stone to 66 carats to improve its brilliance and life a 40% loss in weight that would never have been countenenced in India. Visually, gems of fine water, however well cut, possess a unique beauty not found in other diamonds. In a world flooded with diamonds, this is indeed something special.

Thus, our second definition: Diamonds regardless of geographic origin that are of high color (D-E) that exhibit exceptional crystal are often called Golconda Diamonds.

The situation discussed above in not unique. Before gemologists worked out a way to identify the geographic origin of some diamond, ruby, sapphire and emerald; gems with characteristics similar to those from a certain source were often described using geographic terms such as Cape (as in Good Hope), Kashmir, Burma and Ceylon. These terms have become ingrained in the public mind and associated with certain levels of quality. So today gemstones that can be proven to come from a famous location will often command a high premium that has little or no relationship to the quality of the given gemstone. At auction, diamonds with a proven Golconda provenance may fetch a premium of 50% or more over a diamond of comparable quality that lacks the Golconda provenance.

How does one establish that a diamond is from Golconda? Well, if you can document a chain of ownership dating back to 18th Century India you have a good case. If you are depending on science, forgetaboutit. Even if all Golconda diamonds were type IIa, it does not follow that all IIa diamonds are from Golconda. In fact we know that Brazil has produced type IIa stones.

So, eventually, you think, science will solve the puzzle. Not likely, diamonds are formed within the earth’s mantle deep beneath the country rock where ruby, sapphire and emerald are formed. Diamonds do not contain the signature inclusions that can be matched up with specific geographic locations that make it possible to identify their origin.

Ok, so which would you rather have, a diamond with high color and exceptional crystal or a diamond from one of the historic mines of Golconda? Well, if you are selling the best answer is both because if it of the finest water and a proven Golconda provenance it will command the highest premium of all. Speaking for myself, give me the most beautiful rock. Wouldn’t it be a lot simpler if the finest diamonds came from Hoboken, New Jersey.

If you are interested in learning more about Golconda Diamonds or are simply looking for a new way to dazzle your friends at cocktail parties. Read more about the four Cs of connoisseurship. 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

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

Buy it on Amazon: www.amazon.com

News From Our Workshop



Handmade Originals

By Richard W. Wise, G.G.

© 2007

Well, we are home and back in the saddle again. I am sure that you are all heartily sick of images of us having fun in the sun but, Rio, St. Helena’s, Namibia, South Africa, Mozambique and Kenya: what a great trip.

One good reason to come home, a chance to see two beautiful new creations from the workbench of Laurie Donovan. These handmade original rings are made using a technique we call “floral appliqué”.



The Inspiration:

The design inspiration is drawn from Ukiyo-e or Japanese woodblock printing. The Ukiyo-e style began to influence Western art shortly after the island empire was pried open by Commodore Perry in 1855. In Japan, Ukiyo-e was originally a cheap reproducible art form aimed at the masses, so cheap that these prints originally found their way to Europe, stuffed into crates, as packing material. It wasn’t long before the Ukiyo-e style began to have a strong impact on Western art, inspiring the Art Nouveau movement along with such disparate souls as Gaugan, Van Gogh and Frank Lloyd Wright. (image right: 19th Century Japanese Ukiyo-e woodblock print with stylized leaves)

Ring #1,The Design:

Ukiyo-e provides an excellent point of departure for the Spectrum Award winning artist to demonstrate her lyrical mastery of line. In her experienced hand the jeweler’s saw becomes as versatile as an artist’s pencil. (image left: Ms. Donavan cuts individual petals from gold sheet with jeweler’s saw) The choice of colored golds, in this case yellow and white, provide a subtle counterpoint. The shank of the ring is in 18k white with a sanded finish. This finish adds depth and allows the polished yellow leaves to standout sufficiently to echo and complement the vivid scintillation of the Fancy Vivid Yellow and colorless (D-VS2) diamonds.

The Gems:

Exceptionally brilliant, these Fancy yellows have a slight orangy secondary hue (FVoY). Vivid Yellows will almost always read as either slightly orange or slightly greenish. The orange secondary hue is much to be desired because it adds a sense of sunny warmth. (pictured right, original parcel of FVoY from which these stones were taken)

Ring #2, Design & Gems:

Ms Donovan constructed the second floral appliqué ring of green gold with rose colored appliquéd flower petals. Again the artist draws inspiration from the highly stylized Ukiyo-e designs. Each individual rose gold petal
is unique and beautifully frames the diamond to complete the blossom. These two colored golds are sufficiently exotic to stand up against the combined scintillation of three ideal cut round (D Vs2) diamonds. The green gold is cool, the rose warm. Note the artist has pierced the center section of the design to open it up and give it a lighter feeling. The green gold shank has been sand finished to maximize the contrast and bring out the color of the delicate rose colored petals.

Custom Design; From Concept to Completion:

We have specialized in custom design since our company was formed in 1978. We stand ready to work with you.

Rings in the floral appliqué style can also be made with other gemstones (yours or ours) by custom order. We have been working with contented clients for 28 years. Prices start at about $2,000.00 for a ring in 18k and vary depending upon the complexity of the design. As always the pieces are designed around and for the stones and we create several life-size sketches from which to choose your own unique design. If the first sketches don’t please you we will do more. There is never an extra charge for our creative services.

Visit our online gallery; www.rwwise.com. and send us an email richard@rwwise.com or call us toll free at 800.773.0249 (413.637.1589 in Berkshire County, or outside the U.S.).

Hours; Dead of winter: Thursday, Friday and Saturday from 10-5 (EST). Leave a message and we will call you back.

Interested in reading more about real life adventures in 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

Now only $26.95. You can read a couple of chapters online: www.secretsofthegemtrade.com.

Buy it on Amazon: www.amazon.com