Geographic Minerals

Molybdenite is a rare mineral composed of molybdenum and sulfur, with a chemical composition of MoS2. Similar in appearance and feel to graphite, molybdenite has…

Moissanite is a naturally occurring silicon carbide and its various crystalline polymorphs. It is one of the rarest minerals found in nature because it literally…

Minerals form in all geologic environments and thus under a wide range of chemical and physical conditions, such as varying temperatures and pressure.  Mohrite, (NH4)2…

Mohite is a copper-tin sulfide mineral with the chemical formula Cu2SnS3. It is a triclinic-pedial greenish-gray mineral containing copper, sulfur, and tin. It is of…

Moganite is an oxide mineral with the chemical formula SiO2 (silicon dioxide) that was discovered in 1984. It is a crystalline form of silica that…

Mixite is one of just a handful of bismuth minerals and one of the even fewer bismuth arsenates. It is a rare copper bismuth arsenate…

Mirabilite is a widespread sulfate mineral, hydrated sodium sulfate that forms efflorescences and crusts, particularly in arid regions. It also is known as Glauber’s salt,…

Minyulite is a rare phosphate mineral with a chemical formula of KAl2(OH, F)(PO4)2·4(H2O). It is a mineral consisting of a hydrous basic phosphate of potassium…

Minnesotaite is an iron silicate mineral with formula: (Fe2+, Mg)3Si4O10(OH)2. It is a silicate of iron and magnesium, crystallizing in the triclinic system and occurring…

Minium is the naturally occurring form of lead tetroxide, Pb2+2Pb4+O4 also known as red lead. It is red lead oxide, sometimes found as a mineral…

Jarosite is both an individual mineral and a collective name for many minerals that are related. It is a potassium and iron simple hydrous sulfate…

Mimetite is a lead arsenate and chloride isomorphous with pyromorphite. It is a yellow or brown mineral consisting of a chloride and arsenate of lead,…