Rare. First, second and possibly third (?) oxidation zones.
- 1st Oxidation Zone
- 2nd Oxidation Zone
- 3rd Oxidation Zone
Paragenetic and General Notes
As blue crystals to 1 mm on corroded pseudomorphs of tennantite after enargite (Gebhard, 1999).
As bright-blue bladed crystals with brochantite and devilline (Pinch and Wilson, 1977).
Hard to distinguish from posnjakite.