Extremely rare. Second oxidation zone, Level 30.
- 2nd Oxidation Zone
Paragenetic and General Notes
Gebhard (1999) records that the co-type specimen for keyite, from 30 Level, also hosts an aggregate of flattened, apple-green metazeunerite crystals to 1 mm.
A separate specimen, formerly owned by Crystal Classics and also from 30 Level, showed a small group of platy metazeunerite crystals (to 2 mm) associated with hidalgoite and betpakdalite (all analytically verified) in a vug in siliceous matrix.