Tennantite Subgroup, Chalcopyrite, Löllingite, Bornite, Quartz

Specimen ID: MRF-HJ1

Mineral(s)
Tennantite Subgroup : Cu6(Cu4C2+2)As4S12S
Chalcopyrite : CuFeS2
Löllingite : FeAs2
Bornite : Cu5FeS4
Quartz : SiO2
Locality
Mindat locality:
Events

Photo added to mindat.org

Greenish-grey tennantite with yellow chalcopyrite, bright pale löllingite, very minor dirty-brownish bornite, dark silicates and bluish-grey possible chalcocite. This sample also contains minute patches of covellite elsewhere. Löllingite samples at Kaatiala with very small (50-150um) chalcopyrite patches would seem to be far more common than any samples containing tennantite, such as a superb polished section donated to me by I.M. Sample from J.Dyer.
Jouni Laurinperä - 11th July 2019
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