GIA: Library: FAQs

What are HPHT treated diamonds?
What are synthetic diamonds?
What are lattice diffusion sapphires?
What are CVD diamonds?
What are synthetic HPHT diamonds?
What is GIA's position on the SI3 clarity grade?
What synthetics or imitations mimic tanzanite and are commercially available?
I need to have my diamond ring appraised. Does GIA perform appraisals and if not, how can I locate a qualified appraiser?
I am looking for dealers or suppliers. Where can I find this type of information?
I would like to buy a wholesale price list. Where can I purchase one?
I would like to purchase a book that is now out-of-print. Can you suggest where I might be able to locate a copy of this book?
Where are the majority of diamonds found in the world?
I would like to learn how to cut diamonds. Where can I go to learn this skill?
I would like to buy/sell estate jewelry through auction. Do you have a list of auctioneers?
I am interested in entering jewelry design competitions. Can you direct me to organizations that sponsor these competitions?
Is your library open to the public? Do you mail out photocopies of articles?
I am shopping for diamond. Do you have any helpful advice?
I found a clear, colorless stone (at the beach, in my backyard, etc.) that I think might be a diamond because it scratches glass. How can I find out for sure?
I heard moissanite could look just like a diamond. How can I tell them apart?
What is fluorescence? Is it something I should be concerned about?
I have heard so much about "Ideal Cut" diamonds. How does GIA define "Ideal"?
What is the GIA Color Scale?
What are the Four C's?
What is the GIA Clarity Scale for diamonds?