Trika, Murghob, Gorno-Badakhshan, Tajikistan

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The corundum-bearing deposit in the marble sequence of the Sarydzhilga formation, 7 to 8 km southeast of the Snezhny deposit. It has similar geological structures and associated minerals, but considerably smaller than Snezhny.

Ref: E.Ya. Kievlenko, Geology of gems, 2003, p. 53

Gemstone List

Corundum

Corundum var: Ruby