Treatments
AGL modifies heated-ruby disclosure wordingNew York--American Gemological Laboratories (AGL) is modifying the disclosure terminology it uses for treated rubies by exchanging the term "inorganic (fluxtype)" with "heating residues" in its descriptions of heat-treated rubies, the lab announced. Read More 
How do you heat-treat sapphires with beryllium?Gemology expert Mary Johnson gets into the nitty-gritty of some common colored-gemstone treatments. Read More Pearl Commission votes 'no' on 'cultured' diamondsDubai, United Arab Emirates--The CIBJO Pearl Commission has voted on a number of amendments to the Pearl Blue Book, a definitive set of standards for pearl grading, methodology and nomenclature that the commission has updated each year since the guide's publication in 2006. Read More AGTA GTC issues alert on dyed tourmalineThe American Gem Trade Association Gemological Testing Center (AGTA GTC) has issued a lab update regarding dyed tourmaline. Read More Yehuda sues Blue Nile over treatment disclosureNew York--Yehuda Diamond Co. has filed a lawsuit on behalf of consumers who purchased emeralds from Blue Nile, claiming the Seattle-based online jewelry retailer sold treated emeralds without the full disclosure required under Federal Trade Commission (FTC) guidelines. Read More |
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