Ourayite

ourayite

matildite

berryite

aikinite

Images

Formula: Ag3Pb4Bi5S13
Sulphosalt of silver, lead and bismuth
Specific gravity: 7.18 calculated
Hardness: 2
Colour: Grey
Common impurities: Cu,Sb
Environments

Hydrothermal environments

Localities

At the Ivigtut Mine, Arsuk Fjord, Sermersooq, Greenland, ourayite is the major sulphosalt phase, found in a cryolite body associated with berryite, aikinite, galena, matildite, chalcopyrite, pyrite, native bismuth, native gold, topaz and fluorite (CM 22.565-575, HOM).

At the Deo Gratias Mine, La Cienega, Pitiquito Municipality, Sonora, Mexico, ourayite occurs with base-metal sulphides in diopside tactite, associated with sphalerite, galena and chalcopyrite (HOM).

At the type locality, the Old Lout mine, Poughkeepsie Gulch, San Juan County, Colorado, USA, ourayite was found in a hydrothermal sulphide vein as laths less than 0.1 mm long in a fine-grained matrix of galena and matildite, from a single sample labelled "beegerite" (discredited species) (AM 64.243).

Back to Minerals