Wurtzite

Wurtzite is a zinc sulfide mineral ((Zn,Fe)S), a less frequently encountered structural polymorph form of sphalerite and sphalerite.

It occurs in hydrothermal deposits associated with sphalerite, pyrite and marcasite. It also occurs in low-temperature clay

It was first described in 1861 for an occurrence in the San José Mine, Oruro City , Oruro Department , and named for French chemist Charles-Adolphe Wurtz It has widespread distribution. In Europe it is reported from Příbram; Hesse, Cornwall. In the US it is reported from Litchfield County, Connecticut; Butte, Silver Bow County, Montana; at Frisco, Beaver County, Utah ; and from the Joplin district, Jasper County, Missouri