[Jewelry making - Article 00161] - Re: [Orchid] Lapis grading system?

[Richard Hart]

========[ Invite a Friend - http://www.ganoksin.com/invite.htm  ]========

>     Also transparency of diamond is not taken into account in GIA
>     grading system. By transparency I do not mean inclusions, it is
>     what used to called "water" Two stones which would grade the same
>     on GIA system, but one from South Africa mines and another from
>     India (Golconda) will sell for remarkably different sum. I know
>     that example is theoretical because Golconda diamonds are not
>     available anymore, but for illustration purpose, it is valid

    What gemological test can separate diamonds by "water". What will
    distinguish whether a diamond is from Golconda or any other diamond
    mine. I understood that there was transparent, translucent and 
opaque,
    and I never heard of separation by various degrees of transparency. 
If
    it is not taken into account by G.I.A., where else is information
    available. If I run across a Golconda diamond, and I can get more
    money for it, I would surely like to know how to take advantage of
    that opportunity. 

Richard Hart
____________________________________________________________________
T h e   O r c h i d   L i s t
Open Electronic Forum for Jewelry Manufacturing Methods and Procedures
____________________________________________________________________
Orchid FAQ:
~ http://www.ganoksin.com/orchid/faq.htm
Orchid Archives:
~ http://www.ganoksin.com/orchid/archive
Orchid Galleries:
~ http://www.ganoksin.com/orchid/gallery.htm
Invite a Friend:
~ http://www.ganoksin.com/invite.htm
____________________________________________________________________
Tips From The Jeweler's Bench - Article Archive
~ http://www.ganoksin.com/borisat/tip_sear.htm
The Jeweler's Selected Bibliography List
~ http://www.ganoksin.com/jewelry-books
Buy Orchid Jewelry:
~ http://www.ganoksin.com/shop
____________________________________________________________________
-Unsubscribe:
-Email: orchid-request AT ganoksin.com Body=unsubscribe subject=blank
____________________________________________________________________