WURTZITE - TANZANIA - SPANN COLLECTION 🇹🇿 Wurtzite is a zinc sulphide mineral with the formula ZnS, crystallising in the hexagonal system. It is the high-temperature polymorph of sphalerite and typically forms brown to reddish-black, tabular or pyramidal crystals. Found in hydrothermal veins and metamorphosed ore bodies, wurtzite is a minor ore of zinc and is of interest in materials science due to its semiconductor properties. #Wurtzite #SulphideMinerals #ZincOre | Saltshack

Wurtzite (w/ Epitaxial Sphalerite) - Merelani Hills, Arusha, Tanzania 🇹🇿 Collected 2012. Available, DM for inquiry/info. A well crystallized sample of this material that was collected from a single pocket in 2012. Wurtzite is a rare dimorphism of Sphalerite. According to Dr. Rob Lavinsky these are the best of the species. You can see almost black Sphalerite crystallizing on the top of the Wurtzite. | Great Northern Minerals