GRS Alert: A new type of synthetic spinel appears at the Bangkok show

Introduction In May 2015, the author (AP) was made aware that a company in Thailand (Tairus Co. LTD, Bangkok) had commissioned to a laboratory in Russia the production of new types of synthetic spinel of “lavender” colors by the method of crystal pulling from flux. This technique is the same used at the Institute of […]

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Heat-treatment of spinel

Authors: Adolf Peretti, Ngwe Lin Tun, Thomas Armbruster Published in: Contributions to Gemmology No. 11 Download Publication