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2. Gemological Institute of America - Wikipedia

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

   GIA offers several programs and courses online through an interactive eLearning format, and through its 12 campus locations around the world. The institute also offers corporate training programs and works with trade organizations worldwide to provide technical training in gemstones and jewelry.

3. International Gemological Institute - Wikipedia

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

   IGI is the largest laboratory for certification of diamonds and fine jewelry. [8] IGI is International Organization for Standardization (ISO) 9001: 2000 certified in four countries, including the United States, Canada, India and the United Arab Emirates. [citation needed]

4. Gemmological Association of Great Britain - Wikipedia

   en.wikipedia.org/wiki/Gemmological_Association...

   Certificated courses can be studied in-house at the Gem-A London headquarters through daytime or evening classes, at one of Gem-A's international Accredited Teaching Centres or by Open Distance Learning (ODL) online classes. Gem-A holds an annual conference, bringing together international speakers and delegates to meet and discuss important ...

5. The 10 best places to buy jewelry online in 2024 - AOL

   www.aol.com/lifestyle/best-places-to-buy-jewelry...

   Best for gemstone jewelry: Shane Co. Best for wedding jewelry: Blue Nile. Best for fine jewelry: James Allen. Best for affordable jewelry: Baublebar. Best for trendy jewelry: Mejuri.

6. Gemmological Institute of India - Wikipedia

   en.wikipedia.org/wiki/Gemmological_Institute_of...

   The Gem Testing Laboratory was recognized by the International apex organization of Gem and Jewellery Trade, CIBJO. With increasing consumer awareness, the jewellery industry worldwide began to issue certifications to attest the quality of gem and diamond products. The GII started diamond certification in India in 2000. . [1]

7. Gemology - Wikipedia

   en.wikipedia.org/wiki/Gemology

   Gem identification is basically a process of elimination. Gemstones of similar color undergo non-destructive optical testing until there is only one possible identity. Any single test is nearly always only indicative. For example: The specific gravity of ruby is 4.00, glass is 3.15–4.20, and cubic zirconia is 5.6–5.9 . So one can easily ...