David K. Joyce

Tetrahedrite, Calcite, Chalcocite

6.4x4.5x4.2 cm
Leonard Mine
Butte, Silver Bow Co.
Montana, USA

Tetrahedrite, Calcite, ChalcociteTetrahedrite, Calcite, ChalcociteTetrahedrite, Calcite, Chalcocite

Item number: 28229

This specimen is all part of an open space that is lined with small tetrahedrite crystals that have a number of white calcite scalenohedra of calcite on the sulphides. The tetrahedrite seems to be formed on chalcocite. Some of the chalcocite appears shaped like enargite and could be pseudomorphs of chalcocite after enargite crystals. Interesting piece from a classic American Locality!