Smithite

smithite

hutchinsonite

sartorite

rathite

Images

Formula: AgAsS2
Sulpharsenite, monoclinic paramorph of trigonal trechmannite
Crystal System: Monoclinic
Specific gravity: 4.88
Hardness: 1½ to 2
Streak: Vermilion red
Colour: Pale red, red-orange or brownish orange on exposure to light
Common impurities: Sb
Environments

Hydrothermal environments

Localities

At Jas Roux, La Chapelle-en-Valgaudemar, Gap, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France, smithite is associated with chabournéite, pierrotite, parapierrotite, stibnite, pyrite, sphalerite, twinnite, zinkenite, madocite, andorite, laffittite, routhierite, aktashite, wakabayashilite, realgar and orpiment (HOM).

At the Mogul mine, Silvermines District, Tipperary County, Munster, Ireland, smithite is associated with proustite, gersdorffite and miargyrite (HOM).

At the type locality, Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland, smithite is associated with sphalerite, pyrite, realgar, orpiment, hutchinsonite, sartorite and rathite (HOM).

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