Makar-Ruz, Rai-Iz (Raiz), Tyumen Oblast, Russia

Makar-Ruz ruby deposit in the Polar Ural Mountains is 130 km southeast of Vorkuta, in the Rai-Iz ultramafic massif, part of the Lower Paleozoic Khodatin-Voikar-Syn'insky ophiolite belt. The deposit contains very few gems, but is widely known for its specimens of anorthosite with large deep-red ruby crystals.

Ref: E.Ya. Kievlenko, Geology of gems, 2003, p. 57

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