Chuksin ruby placer deposit, Kochkar' District, Plast, Chelyabinsk Oblast, Russia

The corundum is most intensely concentrated in marbles of the Chuksin-Kuchin graben-syncline, to the north and south of which the Chuksin and Kuchin ruby placer deposits were explored.

On the Chuksin site, the corundum-bearing strata of marbles is limited by faults, which control hydrothermal alteration and contain pink topaz. Granite pegmatites with columbite are widespread west of the site.

In the northern part of the Chuksin area, fine-grained quartz sand with staurolite, kyanite and irregularly distributed grains of corundum prevail in the formation. The corundum is red of different tints, some of which are transparent. The heavy fraction of pan concentrates contains monazite, small (up to 3 mm) crystals of pink topaz, columbite, gold, spinel and others.

Ref: E. Ya. Kievlenko, Geology of gems, 2003, p. 50, 62

Gemstone List


Copyright © Jolyon & Katya Ralph 1993-2018. Site Map. Locality, gem & photograph data are the copyright of the individuals who submitted them. For more information please contact the . Gemdat.org is an online information resource dedicated to providing free gemmological information to all.