Images
Formula: AgAsS2
Sulpharsenite, silver- and arsenic-
bearing mineral, trigonal paramorph of monoclinic
smithite
Crystal System: Trigonal
Specific gravity: 4.77 calculated
Hardness: 1½ to 2
Streak: Scarlet red
Colour: Deep vermilion red
Environments
Metamorphic environments
Hydrothermal environments
Localities
At the type locality, the Lengenbach Quarry, Fäld, Binn, Goms, Valais, Switzerland, trechmannite has been found
as minute red crystals resting on a crystal of baumhauerite in a cavity
in white dolomite
(MM 14.72-82).
Raberite also occurs here very rarely as euhedral crystals up to 150 μm
across associated with yellow
needle-like smithite, realgar,
hatchite and probable trechmannite,
edenharterite and jentschite
(MM 76.5.1153–1163).
Back to Minerals