![]() This structure is a member of the hextetrahedral crystal class ( space group F 43m). Sphalerite crystallizes in the face-centered cubic zincblende crystal structure, which named after the mineral. Marmatite is an opaque black variety with a high iron content. ![]() Miners have been known to refer to sphalerite as zinc blende, black-jack, and ruby blende. In addition to zinc, sphalerite is an ore of cadmium, gallium, germanium, and indium. German geologist Ernst Friedrich Glocker discovered sphalerite in 1847, naming it based on the Greek word sphaleros, meaning "deceiving", due to the difficulty of identifying the mineral. It is found in association with galena, chalcopyrite, pyrite (and other sulfides), calcite, dolomite, quartz, rhodochrosite, and fluorite. Sphalerite is found in a variety of deposit types, but it is primarily in sedimentary exhalative, Mississippi-Valley type, and volcanogenic massive sulfide deposits. Sphalerite (sometimes spelled sphaelerite) is a sulfide mineral with the chemical formula ( Zn, Fe) S. Non-radioactive, non-magnetic, fluorescent and triboluminescent. Transparent to translucent, opaque when iron-rich ![]() Simple contact twins or complex lamellar forms, twin axis Granular – generally occurs as anhedral to subhedral crystals in matrix. Light to dark brown, red-brown, yellow, red, green, light blue, black and colourless.Įuhedral crystals – occurs as well-formed crystals showing good external form. ![]() Black crystals of sphalerite with minor chalcopyrite and calcite ![]()
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