Siegenite

specimen number:
2063624

location:
Buick Mine, Viburnum Trend, Iron Co., Missouri, USA

description:
Lustrous metallic crystals of siegenite to 0.2 cm in size on matrix. In good condition. Nice thumbnail for this Missouri classic.

Located in the Viburnum Trend of southeastern Missouri, the Buick Mine is a world-famous lead-zinc deposit hosted within Late Cambrian dolomite rocks of the Bonneterre Formation. The deposit formed millions of years ago when warm, metal-rich hydrothermal fluids migrated through regional sedimentary strata, precipitating sulfide minerals in porous reef structures and fractures. Discovered during the intense mineral exploration boom of the 1950s and 1960s, the Buick Mine became one of North America's most productive underground operations for lead and zinc ore. Minerals collectors highly treasure the location for its world-class specimens of siegenite, a cobalt-nickel sulfide mineral that typically occurs as bright, metallic, steel-gray octahedral crystals attached to galena, chalcopyrite, and dolomite matrix.

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