Cobalttsumcorite

cobalttsumcorite

cobaltlotharmeyerite

plumbogummite

mawbyite

Images

Formula: PbCo2(AsO4)2.2H2O
Hydrated arsenate, tsumcorite group, cobalt-bearing mineral
Specific gravity: 5.31 calculated
Hardness: 4½
Streak: Light brown
Colour: Brown to red-brown
Environments

Hydrothermal environments

Cobalttsumcorite is a secondary mineral found in dump material from the oxidation zone of polymetallic ore deposits. Associated minerals include quartz, mawbyite, cobaltlotharmeyerite, galena, arseniosiderite and plumbogummite (HOM).

Localities

At the type locality, the Roter Berg mining district, Zschorlau, Erzgebirgskreis, Saxony, Germany, Cobalttsumcorite occurs as brown to yellow rosette-like aggregates, up to 2 mm across, associated with quartz, mawbyite, cobaltlotharmeyerite, galena, arseniosiderite and plumbogummite in dump material from the oxidation zone (AM 87.996).

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