Very rare. Identified in polished section only.
Paragenetic and General Notes
Bindi et al. (2015) describe pseudo-hexagonal crystals of cupropearceite associated with enargite, on zincian tennantite. Within the cupropearcite are narrow zones of cupropolybasite composition.
The bright, narrow, linear zone in the uppermost crystal in the accompanying SEM image is cupropolybasite. The scale-bar is 100 µm.