Fossils for sale, minerals, healing crystals, tumblestones, jewellery and Seashells. All specimens on My Lost Gems are genuine and come with a certificate, carefully selected high quality, and have been fully authenticated. We offer unique and selected 'buy what you see'. We also offer bulk and wholesale pricing. New products are constantly being added.
Sphalerite ((Zn, Fe)S) is a mineral that is the chief ore of zinc. It consists largely of zinc sulfide in crystalline form but almost always contains variable iron. When iron content is high it is an opaque black variety, marmatite. It is usually found in association with galena, pyrite, and other sulfides along with calcite, dolomite, and fluorite. Miners have also been known to refer to sphalerite as zinc blende, black-jack and ruby jack.