Formula: FeTe2
Telluride, marcasite group, forma a series with
mattagamite
Crystal System: Orthorhombic
Specific gravity: 8.057 calculated
Hardness: 3 to 4
Colour: White with bluish or pinkish tint in reflected light
Environments
Frohbergite occurs in hydrothermal ore deposits, rimming chalcopyrite grains, and
as inclusions in gold, petzite or
chalcopyrite (Webmin, HOM).
Associated minerals include chalcopyrite, altaite,
gold, melonite,
petzite, montbrayite,
sylvanite, tellurobismuthite,
pyrite, sphalerite,
marcasite, chalcocite and
covellite
(HOM).
Localities
At the type locality, the Robb-Montbray Mine, Rouyn-Noranda TE, Abitibi-Témiscamingue, Québec, Canada, frohbergite was found
associated with altaite, tellurobismuthite,
montbrayite, melonite,
petzite, chalcopyrite,
pyrite, marcasite,
sphalerite, chalcocite,
covellite and free gold, in polished sections of the
rich telluride ore. It appears in fringes surrounding chalcopyrite, and also
as inclusions in gold, petzite or
chalcopyrite
(AM 32.210).
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