Category Archives: Sancy Diamond

The Golconda Diamond

Golconda Diamond

by Richard W. Wise

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

Rocky Road II; Grading The Colorful

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Rocky Road II; Grading The Colorful

By Richard W. Wise, G.G.

Mirror, mirror, on the wall, who will be the biggest of them all? An Interview with Michael Haynes

After several near misses last Saturday I spent a bit of quality phone time with Michael Haynes, President of Collector’s Universe (CU). First a little background: You will recall from Part I that CU has acquired American Gemological Laboratory (AGL) the only major gem laboratory that quality grades colorful gemstones. The acquisition that took place in early 2006, with a 3.5 Million upfront payment to AGL President C. R. Beasley with an additional 3.5 million payable in five years.

Collectors Universe is a public company traded on NASDAQ with a market capitalization of 120 million dollars. The company bills itself as “the leading provider of value added authentication and grading services of high-value assets”. According to Haynes; last year CU certified 1.8 billion dollars worth of collectables including 65% of all stamps certifed, 85% of sports cards and perhaps 45% of all coins.

AGL is CU’s third acquisition on the road towards its publicly stated objective of becoming the major purveyor of gemstone quality reports “maybe not tomorrow, or next year, but within the foreseeable future. As part of its strategy CU had previously acquired GCAL a diamond grading laboratory and Gemprint the company that has patented a method of taking an identifiable “fingerprint” of a cut diamond.

Michael Haynes is a passionate pitchman. He sees CU’s coming dominance of the certification business as a win-win for everyone. Why he asks isn’t the fine gemstone business experiencing similar growth levels as other luxury products? According to CU’s president, it’s a matter of consumer confidence or the lack thereof. He contrasts the experience of buying a Hermes scarf with that of buying a ruby necklace. You go to a Hermes store. There is no question of authenticity or value; it is only a question of price. You go to the jewelry store and you enter a world of doubt. Is it real? What is it really worth? “Money”, says Haynes, “travels the path of least resistance.” Buying an expensive piece of jewelry, all you have to rely on is the seller and he is after all the seller. Independent third party certification by a publicly traded company will end the doubt and level the playing field, Haynes puts it succinctly: “remove doubt, increase sales”.

As any professional will attest, much of what Haynes says is spot on. Consumer doubt is a component of a large majority of missed sales opportunities particularly high-end sales. Doubt coupled with professional ignorance and competitive low-balling have made gem and jewelry selling a competitive mine field (read: my blog post: Getting an Appraisal; Some Do’s and Don’ts.)

Next I asked Haynes how he foresees CU succeeding where so many have failed? “By establishing an promoting a consistent standard.”

How about competition from GIA? Haynes barely skips a beat. “That’s a question”, he suggests, “you should be asking GIA”. With CU’s triumvirate of acquisitions Haynes appears confident that CU has covered all the bases. If the Gemological Institute of America wishes to compete in colored stone grading game, it is GIA that will be playing catch-up.

Laboratory One-upmanship:

At the season opener, Tucson 07, CU will throw out the first ball of the season. Its AGL subsidiary will announce a plan to offer a range of gem certificates. From being one of the most expensive labs, AGL is about to become the least expensive offering a range of modestly priced grading reports. In a separate conversation last week, AGL President Cap Beasley outlined the new program. The Lab will offer certification on a series of levels called Fast Track. For $25, Fast Track I will offer a credit card sized report providing just authentication and enhancement. Fast Track II will add the 4 C’s for $50 and for $75 Fast Track Premier will add type as in Burma-type, Paraiba-type, etc.

Collectors Universe is aiming at the consumer. The aim is to produce a document that is easily understood by the retail buyer. Perhaps this new format will accomplish that. AGL’s current offerings are not all that easy to understand. Though in recent years the lab has added a Total Quality Integration Rating (TQIR) to summarize all of the various grading factors and give the gem an overall quality grade.

Book Review

The Sancy Blood Diamond

In this historical potboiler, author Susan Ronald traces the history of the Sancy Diamond from the mines of Golconda to its current tranquil resting place in The Louvre. As the largest and most famous diamond in Europe from the Fourteenth through the Seventeenth Century, The Sancy had many admirers and several owners; from Charles the Bold through Napoleon, kings, queens, cardinals and dukes, some of them major players on the stage of European history.

Ronald does more; she is a knowledgeable political-historian and along the way she weaves the Sancy’s chronology into to woof and weft of European political history.

As Ronald shows, The Sancy and by extension other famous gems did more than add luster to the crowns of European Monarchs. Goldsmiths were Europe’s first bankers. It should come as no surprise, therefore, that long before the present conflicts in Africa, large and famous gems provided the bloody collateral of choice, pledged by Europe’s crowned heads to the financiers who bankrolled Europe’s major conflicts.

Ronald’s account is authoritative, fast paced and reads like a Machiavellian analysis of history. From the killing fields of Nancy, to Charles I’s beheading, to the court of the Sun King, Ronald shows how sex, power and greed as represented by The Sancy, fueled the politics of Europe. The book was published in 1995, don’t know how I missed it. The book is particularly relevant given the present interest in conflict diamonds. Highly recommended. For more on the stone and the author: www.thesancydiamond.com

Ronald, Susan, The Sancy Blood Diamond, Wiley & Sons, New York, (hardcover) $27.95, $18.45 on Amazon.

Into Africa:

For the first time in twenty years I will miss the Tucson Gem Shows. I will be in Brazil and cruising the coast of West, South and East Africa until mid-February. Meanwhile the contest goes on. (see the previous post, Rocky Road I) Guess the value of the French Blue diamond in 1698 and win a free copy of my book, Secrets Of The Gem Trade, The Connoisseur’s Guide To Precious Gemstones. The Secrets website will also not be functioning for orders. If you need it right away order it on www.Amazon.com. (See below)

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

Buy it on Amazon: www.amazon.com

Grading The Colorful

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Grading the Colorful, The Rocky Road to Quality Assessment

by Richard W. Wise, G.G.

“Collectors Universe has stated it has every intention of becoming the world’s leading purveyor of diamond and colored stone pedigrees—”maybe not tomorrow, or next year,” (CU President) Haynes says, “but within the foreseeable future.”

David Federman, Professional Jeweler, 2006

At the beginning of a new year it is traditional to assess the past year, make resolutions and talk about the future. Several happenings over the past twelve months that considered in isolation are important taken as a whole appear to be crucial milestones along the road toward colored gemstone quality grading.

A consortium of seven major gem laboratories under the aegis of the Laboratory Manual Harmonization Committee (LMHC) established important precedents:

First, they abandoned the traditional protocol of naming a gem based on species and variety. The committee agreed that on grading reports issued by member labs to use the term “Paraiba” to describe all copper colored or cuprian tourmalines regardless of their actual source.

In a separate decision, the LMHC also decided to stray beyond the realm of verifiable science and enter the world of aesthetics. They agreed to adopt a set of color parameters for and use the term “Padparadscha” sapphire on grading reports issued by member labs.

This year a new player entered the grading games: Collectors Universe (CU), a publicly traded company that provides certification for coins stamps and guess what, baseball cards purchased American Gemological Laboratories (AGL) the only major U. S. lab that issues quality grading reports on colored gemstones. CU has the financial muscle and appears poised for an strategic play: The company already owns Gem Certification and Assurance Lab (GCAL) as well as Gemprint, the diamond identification and registration system that will laser print an ID # on gemstones.

In order to have a universal colored stone grading system you must have a universally acceptable methodology. Internet shoppers, in particular, are demanding a way to compare apples to apples and what the market requires the market sooner of later gets. Getting all major players to accept a single methodology may be difficult but a broad basis of agreement between a number of important labs may do the trick. The LMHC includes seven of the world’s most respected gemological laboratories: (AGTA Gem Testing Center, CISGEM (Milan), GAAJ (Japan), GIA (USA), Gemological Institute of Thailand, Gübelin Gem Lab (Switzerland) and SSEF Swiss Gemmological Institute (Switzerland) missing only AGL and The Swiss Lab Bangkok (GRS) the very well respected Bangkok based lab run by Adolph Piretti.

Historically, no institution, not even the mighty Gemological Institute of America (GIA), the originator of the universally accepted diamond grading system, has succeeded in creating an acceptable colored stone grading system. GIA tried twice, first in the 80s Colormaster, a sort of color blender and then with Gemset, a set of round faceted plastic doohickeys, both of which were flawed and failed to win industry wide acceptance. GIA has wisely abandoned its go it alone strategy and joined LMHC.

Instrument based color determination appears to be the wave of the future. According to American Gemological Laboratories C. R. “Cap” Beasley “instrument based measurement is simply more consistent”. The fact is; you have the rock, the light and the observer, standardize the latter two and you are eliminate two variables. Does Beasley have an instrument? None that he will admit to.

AGL is still the only major laboratory that grades colored gemstones. Beasley introduced his own system, Colorscan, in the early 1980s, a system that many gemologists including this writer believes was the most viable system yet created. Colorscan, however, relied on the human eye as observer. New Computer based systems such as Gem-e-Square that project a range of hue/saturation/tone on a color computer monitor also require the human eye and judgment to make a call.

Collectors Universe appears to be making a bid to become a major player in quality grading. I will be interviewing CU president Bill Haynes, later in the week. Stay tuned.

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

Do ya feel lucky? Win A Free Copy:

Thats right win a free copy of Secrets Of The Gem Trade, The Connoisseur’s Guide To Precious Gemstones, answer the question.

The Hope Diamond, Inflation in the Seventeenth Century

In 1669 Louis XIV of France purchased the French Blue diamond from the famous gem merchant Jean-Baptiste Tavernier for 220,000 livres or 42.7 million dollars (1 livre = $1,941.). In an inventory taken by the French crown in 1691 the Sancy Diamond, a colorless stone of 55.23 carats and the largest white diamond in Europe at that time, was valued at 24.2 million dollars.

By the time this inventory was taken, The French Blue, had been recut by M. Pitau to 69 carats, a 40% loss in weight. Despite this the stone that ultimately became the Hope Diamond, was valued at…in 1691? The first person who comes closest wins a signed paperback copy of Secrets Of The Gem Trade. Post your answer in French livres and your email address to the Comments section of the blog. Winner’s name to be posted on GemWise in two weeks. Hint: read Ronald, The Sancy Blood Diamond, Morel, The French Crown Jewels