Book Chapter Age and origin of Colombian gem corundums

Citation: Sutherland F.L; Duroc-Danner, J.M; Meffre, S.. 2007. Age and origin of Colombian gem corundums. N/A (ed). pp 113-115 In 30th International Gemmological Conference, July 15th-19th, Moscow, Russia, The collection of expanded abstracts and some articles. N/A.

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