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You are here: Home / Books / Ruby & Sapphire: Treatments and Identification – Decades of Advancement

Ruby & Sapphire: Treatments and Identification – Decades of Advancement

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Author: Visut Pisutha-Arnond
Color 95 pages
Published: 2017

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Gemmological Research Industries Inc. is a consulting company that specializes in the identification, grading and evaluation of gem quality rough, polished and mounted diamonds, gems, research and training of all segments of jewellery industry.

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