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New Ruby Treatment Not Classified as Composite

May 4, 2010 9:13 AM   By American Gemological Labs
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Press Release: The American Gemological Laboratories (AGL) has concluded its initial investigations into a new ruby treatment that has been entering the market. During the past year, another new ruby treatment has been coming out of Thailand and is offering a low-cost alternative to more traditionally heated ruby.

“The conundrum for the trade has been how to deal with these new stones and what kinds of disclosures need to be made,” indicated Christopher P. Smith, the president of AGL.
AGL has decided not to classify this new treatment as composite ruby or to develop another new classification for the disclosure of this treatment, based on its consideration of several factors. In the lab’s opinion, this treatment is more similar to the “glass-filled” rubies that were prevalent during the early to mid-1990s than the more recent composite ruby.

“At that time, the discussions of glass-filled rubies revolved primarily around rough of Mong Hsu ruby that was being treated, with significant amounts of glass — like heating residues that were remaining,” Smith said. “Today, the material we are discussing is coming mainly from Mozambique, but the issues involved are quite similar.”
Initial durability studies were also carried out and these stones were found to have less special care requirements than composite rubies. AGL cautions that all gems should be properly cared for these stones were most similar to the more traditionally heated rubies possessing heating residues when exposed to conditions in a jeweler’s workshop or with commercial household products.
“It is our opinion that the wording policy we have put in place for this material provides a practical approach for the industry and labs to address these stones and maintain that adequate disclosures are being made available to consumers,” Smith concluded.
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Tags: American Gemological Labs, Consumers, Laboratories, Labs
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