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2. International Gemological Institute - Wikipedia

   en.wikipedia.org/wiki/International_Gemological...

   International Gemological Institute (IGI) is a gemological organization which certifies diamond, colored stone and jewelry. It was established in 1975 in Belgium. It was established in 1975 in Belgium.

3. Tanzanite - Wikipedia

   en.wikipedia.org/wiki/Tanzanite

   Tanzanite is the blue and violet variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate), caused by small amounts of vanadium. [3] Tanzanite belongs to the epidote mineral group. Tanzanite is only found in Simanjiro District of Manyara Region in Tanzania , in a very small mining area approximately 7 km (4.3 mi) long and 2 km ...

4. Zoltan David - Wikipedia

   en.wikipedia.org/wiki/Zoltan_David

   2007 – Tanzanite Foundation, ‘Be Born To Tanzanite’ Award; [7] AGTA Spectrum Award - Classical Division. [8] [9] 2009 – "Best of Silver" National Jeweler Magazine Design Award; [10] America's Coolest Jewelry Store – InStore Magazine. [4] 2010 – "Designers Award", International Pearl Design Competition, Cultured Pearl Association of ...

5. Are lab-grown diamonds 'worthless'? Experts weigh in as ... - AOL

   www.aol.com/news/lab-grown-diamonds-worthless...

   Some high-end fine jewelers have gotten on board with the trend. In 2023, jeweler Jean Dousset, the great-great-grandson of Louis Cartier, opened a showroom with “designer” lab-grown diamonds ...

6. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   International Gemological Institute (IGI), independent laboratory for grading and evaluation of diamonds, jewelry, and colored stones Hoge Raad Voor Diamant (HRD Antwerp), The Diamond High Council, Belgium is one of Europe's oldest laboratories; its main stakeholder is the Antwerp World Diamond Centre

7. Gemological Institute of America - Wikipedia

   en.wikipedia.org/wiki/Gemological_Institute_of...

   In 1953 the GIA developed its International Diamond Grading System and the "four Cs" (cut, clarity, color, and carat weight) as a standard to compare and evaluate the quality of diamonds. [ 2 ] As of 2024, the institute is headquartered in Carlsbad, California , and operates in 13 countries, with 11 campuses, 9 laboratories, and 4 research centers.