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Although it has a rather simple chemical formula, stromeyerite (AgCuS), is a relatively rare silver-copper sulfide. We have a rich, Canadian example from the Mountain Boy Mine near Stewart, British Columbia.
Mountain Boy is located in BC's "Golden Triangle" which hosts multiple precious metals mines and prospects. The area also famous for its rugged, untamed forests and mountain eco-systems which have restricted access and development. Our stromeyerite was provided to us by western Canadian mineral expert Allan Ingelson and is mostly massive sulphides with no crystallizations. The piece, however, is very rich and correspondingly heavy for its size. There is a small amount of malachite on the specimen as well.
Stromeyerite is an uncommon silver-bearing mineral that is particularly interesting to collectors of sulfides and silver-copper mineral associations. The combination of an unusual mineral species, a historic British Columbia mining locality and Allan Ingelson collection provenance makes this a worthwhile addition to a Canadian or systematic mineral collection.
Minerals: Stromeyerite (AgCuS) Locality: Mountain Boy Mine, Stewart, British Columbia, Canada Crystal System: Orthorhombic Mineral Class: Sulfide Provenance: Ex Allan Ingelson collection Dimensions: 10 × 8 cm