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GIA vs AGS certs

Discussion in 'RockyTalky' started by starbug, Apr 22, 2002.

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  1. starbug
    Rough_Rock

    Messages:
    4
    Joined:
    Apr 21, 2002
    by starbug » Apr 22, 2002
    What is the main difference beteen these two types of certification?

    Does certain diamonds only 'qualify' for either cert?

    :confused:
     
    


    


  2. Garry H (Cut Nut)
    Super_Ideal_Rock
    Trade

    Messages:
    14,537
    Joined:
    Aug 15, 2000
    by Garry H (Cut Nut) » Apr 22, 2002
    There is little if any difference in color / clarity and none in weight exceept AGS list to .001ct where as GIA round down.
    AGS 1.008ct = GIA 1.00ct AGS 1.000ct = GIA 1.00ct
    AGS 1.009ct = GIA 1.01ct

    But AGS give more cut info - but the info means they sell for more because in theory only the best cuts go to AGS. In practice many if not most AGS 0's (top cut grade) are inferior because they use a system based on a 1919 theory (Tokkowsky) that was wrong. see http://www.folds.net/diamond/index.html

    So I buy and sell GIA but make sure they look good first and save some money. You can too with HCA and an www.ideal-scope.com if you are prepared to put in some effort.
     
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