Stalderite

stalderite

hutchinsomite

hatchite

orpiment

Images

Formula: TlCu(Zn,Fe,Hg)2As2S6
Sulphosalt, routhierite group, thallium- and arsenic- bearing mineral
Specific gravity: 4.97 calculated
Hardness: 3½ to 4
Streak: Brown-red
Colour: Black with a blue and red iridescence
Environments

Hydrothermal environments

Localities

At the type locality, the Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland, stalderite was found in small cavities of hydrothermal origin in dolomite. It is associated with other thallium and arsenic minerals such as hutchinsonite, hatchite, realgar and orpiment in druses in dolomite (AM 81.1015).

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