Copper replacing Cuprite

specimen number:
2062576

location:
Rubtsovsk Mine, Rubtsovsky, Altai Krai, Russia

description:
A grouping of sharp large octahedral cuprite crystals, these in the process of being replaced by crystallized native copper. There is very little cuprite showing through the native copper. In super condition all around. The specimen comes with a previous label from the collection of Ray DeMark. He acquired the specimen in 2012.

The Rubtsovsk Mine, located in the Altai Krai region of southwestern Siberia, Russia, is part of the metal-rich Rudny Altai polymetallic belt. Geologically, the deposit sits within complex Paleozoic volcanic and sedimentary sequences where hydrothermal activity and extensive supergene oxidation created rich zones of secondary mineralization. Mineralogically, it is particularly famous for its exceptional, razor-sharp octahedral crystals of cuprite, often accompanied by native silver, native copper, and rare halide species like miersite.

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