Very rare combo specimen of Cuprite with Copper and minor Silver. The Silver is very uncommon minerals for Rubtsovskoe Cu-Zn-Pb deposit. Many sharp and lustrous dark Cuprite octahedrons grow above Copper-Silver core. Displays nicely from many angles. For references see the issue of The Mineralogical Record vol. 45, # 4, July-August 2014. In very good condition – some small nicks and contacts. On acrylic base.

Excellent!