Gemological

The Hong Kong shop submitted the diamond for certification to the Gemological Institute of America, according to the lawsuit filed by Graff's at the New York supreme court in Manhattan.

Graff robbery diamond turns up in Hong Kong pawn shop 2012

"He created a market for them from zero to a well-known global desirable product, and that's pretty rare," said Thomas Moses, an executive at the Gemological Institute of America.

Cultured by Luxury Jeweler, Black Pearls Became Chic Stephen Miller 2011

Gemological Institute of America Salvador Assael Although he dealt in all sorts of luxury jewelry, Mr. Assael was sometimes called "The Pearl King" for his near-monopoly on gumball-size black pearls he cultured on a private atoll on the Tuamotu Archipelago in French Polynesia.

Cultured by Luxury Jeweler, Black Pearls Became Chic Stephen Miller 2011

"It's very important for investors considering buying sapphire jewelry to understand exactly what they're buying," says Jack Ogden , chief executive of the Gemological Association of Great Britain.

Fit for a Queen Angela Henshall 2011

Gemological impresario Salvador Assael elevated black pearls from curiosities to luxury jewels.

Cultured by Luxury Jeweler, Black Pearls Became Chic Stephen Miller 2011

Sotheby An exceptionally rare pink diamond of the purest, vibrant hue, weighing 24.78 carats and graded Fancy Intense Pink by the Gemological Institute of America.

Spring Art Auction Highlights 2011

Another legitimate certifier is the European Gemological Laboratories.

Choosing A Diamond Isn't So Rough 2009

I put an ad in the "Gemological Helper" and a couple months later, I got a letter from this wonderful lady.

CNN Transcript Feb 25, 2009 2009

Two of the main companies that certify diamonds in the U.S. are the American Gem Society Laboratories and the Gemological Institute of America.

Choosing A Diamond Isn't So Rough 2009

I put an ad in the "Gemological Helper" and a couple months later, I got a letter from this wonderful lady.

CNN Transcript Jul 27, 2008 2008