Chalcostibite
- Siberia
- Russia
- 4.4 by 3.0 by 2.3 cm – Miniature specimen (fits into a 5 cm cube)
Chalcostibite blades to 2 cm formed in a calcite vein section. Perhaps the crystals could be etched out of the matrix. This specimen lacks a detailed locality since it originally sold when the Soviet Union kept strategic mineral localities secret. Fersman Mineral Museum label. Former Bill and Ann Cook collection, Cleveland Heights, Ohio.
Price: $20
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