Neyite

neyite

molybdenite

cosalite

aikinite

Formula: Ag₂Cu₆Pb₂₅Bi₂₆S₆₈
Sulphosalt, silver-, copper, lead- and bismuth- bearing mineral
Crystal system: Monoclinic
Specific gravity: 7.02 measured, 7.037 calculated
Hardness: 2½
Streak: Grey
Colour: Lead-grey, grey-blue, yellow-blue, silver-grey
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).
Neyite from the British Columbia Molybdenum Ltd. Mine - Image

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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