Tsumeb is the Type Locality
Extremely rare. Type specimen is from 29 Level, second oxidation zone.
- 2nd Oxidation Zone
Paragenetic and General Notes
Brunogeierite has a spinel-type structure. The formula has been restated as (Fe2+)2Ge4+O4 (Cempirek and Groat, 2013) and this has been approved by the IMA. Cubic crystals, exceptionally to 5 mm (but usually sub-mm), grey-black, encrusting cavities in tennantite. Brunogeierite is magnetic and, visually, it resembles magnetite.