Khit Ostrov (Khit Island), Northern Karelia, Republic of Karelia, Russia

The Khito-Ostrov corundum deposit is located 9 km north of the settlement of Chupa.

Corundum disseminations are mainly distributed in marginal parts of anorthosite bodies in association with garnet of pyrope-almandine composition (rhodolite) and amphibole. Corundum also replaces accessory kyanite in the staurolite-garnet-biotite-amphibole rock.

Corundum crystals from anorthosite have prismatic and, less often, bladed or barrel-like shapes. The colour is pink, grayish-pink, crimson, and, less often, scarlet. The crystals are up to 5 cm long and up to 3 cm in diameter. The corundum contains gas-liquid and solid inclusions.

Ref: E.Ya. Kievlenko, Geology of gems, 2003, p. 59


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