#GRS documentary 2015: Interesting discoveries at the Mandalay gemstone market
#GRS documentary 2015: Interesting discoveries at the Mandalay gemstone market
#GRS education 2015: Heat treatment of spinel in Mogok, Burma (Myanmar)
#GRS education 2015: Heat treatment of spinel in Mogok, Burma (Myanmar)
#GRS education 2012: World of magnificent spinel – provenance and identification
#GRS education 2012: World of magnificent spinel – provenance and identification
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