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Latest GRS Alerts

New types of synthetic periclase identified by C2S inclusions – dicalcium silicate cement hardener 19/12/2018

Warning: Synthetic Padparadscha sold as Natural in the trade. 11/09/2018

GRS Alert: Unusual phosphorescent pebbles identified as synthetic aggregates 24/04/2016

Recent Posts

Retake of GRS presentation on HPHT-treated sapphires from 2019 GILC meeting in Tucson, AZ 05/02/2019

Q&A on PHT-treated sapphires published in Southern Jewelry News 22/01/2019

New types of synthetic periclase identified by C2S inclusions – dicalcium silicate cement hardener 19/12/2018

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GRS Gemresearch Swisslab

4 weeks ago

News on HPHT-treated sapphires making headlines. Courtesy of Rapaport Magazine (Issue May 2019). ... See MoreSee Less

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