Images
Formula: Cu3AsS4
Sulphosalt, stannite group,
paramorph of enargite, forms a
series with famatinite
Specific gravity: 4.4 to 4.6
Hardness: 3½
Streak: Black
Colour: Deep pinkish brown
Common impurities: Sb
Environments
Luzonite is a primary mineral in hydrothermal
copper-arsenic-antimony
rich veins and disseminated deposits, formed at low to medium temperatures. Associated minerals include
enargite,
tetrahedrite–tennantite,
colusite, stannoidite,
pyrite, chalcopyrite,
covellite, sphalerite,
bismuthinite, silver
sulfosalts, silver, gold,
marcasite, alunite,
baryte and quartz
(AM 42.766-779, HOM).
Localities
The type Locality is the Lepanto mine, Mancayan mineral district, Benguet Province, Cordillera Administrative Region,
Luzon, Philippines.
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