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Showing posts with label Gem Research Swiss Lab. Show all posts
Showing posts with label Gem Research Swiss Lab. Show all posts

Monday, October 16, 2023

Tuesday, May 30, 2023

GRS Report On Estrela de Fura

Being actively involved in gem testing since 1988, Dr. A. Peretti is probably the best gemologist who knows a lot about rubies and its origin and its quality. The Q & A is a must read for anyone interested in rubies.


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