Common. Documented from the second oxidation zone (Weber, 1977). Probably also in the first (?) and third (?) oxidation zones.
- 1st Oxidation Zone
- 2nd Oxidation Zone
- 3rd Oxidation Zone
Paragenetic and General Notes
Powdery to acicular crystals and masses (Pinch and Wilson, 1977). As black coatings on cerussite and calcite; sometimes with (much rarer) coronadite, chalcophanite, and romanèchite (Gebhard, 1999).