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  2. Gemological Science International - Wikipedia

    en.wikipedia.org/wiki/Gemological_Science...

    GSI Gemological Laboratory performs a number of services including: loose and mounted diamonds grading; origin testing of loose and mounted diamonds and gemstones; cut grade analysis; light analysis reports; gemstone identification; sorting and screening of melee; treatment identification; laser inscription on diamonds and gemstones; metal engraving; metal inspection; and 360-degree virtual ...

  3. 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]

  4. International Gemological Institute - Wikipedia

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

    IGI has the only international certification lab controlled by one central governing body that adheres to one internationally accepted system for diamond grading. [ citation needed ] IGI is International Organization for Standardization (ISO) 9001: 2000 certified in four countries, including the United States, Canada, India and the United Arab ...

  5. Gemological Institute of America - Wikipedia

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

    Diamond reports from GIA (as well as other, for-profit sources) are now demanded by most consumers purchasing diamonds over a certain size, typically for over 0.5 carat (100 mg), and almost always for over 1.0 carat (200 mg), and are considered an important tool in guaranteeing that a diamond is accurately represented to a potential buyer.

  6. Gem and Jewellery Export Promotion Council - Wikipedia

    en.wikipedia.org/wiki/Gem_and_Jewellery_Export...

    There are seven educational institutes across five cities, and four gemological laboratories under the GJEPC.. Indian Institute of Gems & Jewellery (IIGJ): They include Indian Institute of Gems & Jewellery in Mumbai, Jaipur, Delhi, Varanasi [13] [14] and Udupi [15] [16] [17] along with the Indian Diamond Institute in Surat.

  7. Gemmological Association of Great Britain - Wikipedia

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

    Graduates of the Diamond Diploma may use the letters DGA after their name for as long as they remain paid-up members of the 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 ...

  8. American Gem Society - Wikipedia

    en.wikipedia.org/wiki/American_Gem_Society

    Primary among these are their diamond grading services. Jewelers are able to have their diamonds scientifically evaluated according to the Four Cs: Color, Clarity, Cut, and Carat Weight. They are then given a diamond grading report, which can be provided to a consumer in order to verify the quality of the diamond they are purchasing.

  9. Clean Diamond Trade Act - Wikipedia

    en.wikipedia.org/wiki/Clean_Diamond_Trade_Act

    On 28 November 2000, in Gaborone, Botswana, negotiators for dozens of diamond exporting and importing countries ended over a year of negotiations and agreed on the elements of an international certification program, [13] which would become the Kimberley Process Certification Scheme, adopted by the UN at their 79th plenary meeting on 1 December ...