Rare. Second oxidation zone (just above 30 Level).
Masses of briartite (at the time unidentified) to 5 Kg were found just above 30 Level by Geier in 1955 (Gebhard, 1999).
Paragenetic and General Notes
Briartite is a rare, inconspicuous, grey mineral with a dull metallic sheen. It occurs either as ovoid masses in tennantite, germanite, and renierite and as minute inclusions in sphalerite, or it forms a very fine intergrowth with tennantite and renierite, in sphalerite (Keller, 1977). Please note that these textures are only visible in polished section, with reflected light microscopy.