Neyite

minerals

molybdenite

cosalite

aikinite

Formula: Ag2Cu6Pb25Bi26S68
Sulphosalt
Specific gravity: 7.02
Hardness: 2½
Streak: Grey
Colour: Lead gray, Gray blue, Yellow blue, Silver gray.
Environments

Igneous environments

Localities

At the type locality, the British Columbia Molybdenum Ltd. mine, Patsy Creek, Kitsault, Alice Arm, Skeena Mining Division, British Columbia, Canada, neyite is a primary sulphide mineral in the porphyry molybdenum deposit (Webmin). It occurs in late-forming cross-cutting hydrothermal quartz veins in a quartz-molybdenite stockwork. Associated minerals include pyrite, galena, sphalerite, chalcopyrite, aikinite, cosalite, tetrahedrite, nuffieldite and molybdenite (HOM).

At the Johnny Lyon Hills, Cochise County, Arizona, USA, neyite occurs in quartz veins associated with gold, chalcopyrite and nordströmite, as well as quartz (HOM).

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