Luzonite

luzonite

famatinite

enargite

stannoidite

Images

Formula: Cu₃AsS₄
Sulpharsenate, 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

Hydrothermal 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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