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  2. International Gemological Institute - Wikipedia

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

    The International Gemological Institute "has been at the forefront of technology since its commencement in 1975". This characteristic can be seen in the actions that the IGI has taken recently towards creating an Online Data Retrieval program and its Registration and Recovery Service. [ 3 ]

  3. Diamond clarity - Wikipedia

    en.wikipedia.org/wiki/Diamond_clarity

    The clarity grading system developed by the GIA has been used throughout the industry as well as by other diamond grading agencies including the American Gemological Society (AGS), and the International Gemological Institute (IGI). There are other smaller labs which use the GIA system as well.

  4. Gemological Institute of America - Wikipedia

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

    While both reports contain a number of measurements, including dimensions, proportions, carat weight, color, and clarity, the Diamond Grading Report also includes a diamond plot (a graphic representation of the position and type of inclusions present in the diamond). Diamond reports from GIA (as well as other, for-profit sources) are now ...

  5. 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 ...

  6. Diamond cut - Wikipedia

    en.wikipedia.org/wiki/Diamond_cut

    They grade from 0 to 10, with ranges corresponding to single descriptive words: Ideal (0), Excellent (1), Very Good (2), Good (3-4), Fair (5-7), Poor (8-10). [ 25 ] The GIA began grading cut on every grading report for round brilliant beginning in 2006 [ 26 ] based on their comprehensive study of 20,000 proportions with 70,000 observations of ...

  7. Worthy.com - Wikipedia

    en.wikipedia.org/wiki/Worthy.com

    The diamonds sold at Worthy.com are graded at the Gemological Institute of America (GIA) or at the International Gemology Institute (IGI). The brand-named watches are authenticated at CentralWatch. Prior to auction, Worthy.com makes available the item's photographs and diamond grading report to the networks of pre-selected professional buyers.

  8. NFL midseason report card: Grading each team and providing ...

    www.aol.com/news/2015-11-11-nfl-midseason-report...

    Some teams have made the grade and, well, some have not thus far. Consider that there are six or seven legitimate Super Bowl NFL midseason report card: Grading each team and providing their outlook

  9. 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.