Geographic Minerals

Meyerhofferite is a mineral [Ca2B6O11.7H2O] consisting of a hydrous calcium borate. It is a hydrated borate mineral of calcium, with the chemical formula Ca2B6O6(OH)10·2H2O, CaB3O3(OH)5·H2O, or Ca2(H3B3O7)2·4H2O.…

Epsomite is most commonly formed by the deposition of material by saline springs as efflorescence on cave walls. It is a mineral of hydrous magnesium…

Polyhalite, a mineral sulfate found in deposits of evaporite (K2Ca2Mg(SO4)4•2H2O) that also occurs with anhydrite and halite. It crystallizes in the triclinic system although it…

Metazeunerite is an arsenate mineral with a chemical formula of Cu(UO2)2(AsO4)2·8H2O. It is a mineral consisting of a hydrous arsenate of copper and uranium with…

Halite (/ˈhælaɪt/ or /ˈheɪlaɪt/) is a very common and well-known mineral, commonly known as rock salt; its chemical name is sodium chloride (Na Cl). It…

Kieserite (MgSO4·H2O) is the mineral for magnesium sulfate and found in deposits of evaporite. Named for Dietrich Georg Kieser (August 24, 1779, Harburg / Elbe-October…

Metatorbernite is a mineral Cu(UO2)2(PO4)2.8H2O consisting of a hydrous phosphate of copper and uranium containing less water than torbernite. It is a radioactive phosphate mineral…

Evaporite (/ɪˈvæpəraɪt/) some of the different minerals present in the sedimentary deposition of soluble salts resulting from the water evaporation. There are two types of…

Ulexite (NaCaB5O6(OH)6·5H2O, hydrated sodium calcium borate hydroxide), occurs with a silky luster as fibrous white or grey to colorless, clear, or translucent crystals. The white…

With its pale yellow color, Carlosruizite can be identified in the field. It is a mineral iodate with chemical formula-sulfate or selenate: K6(Na,K)4Na6Mg10(SeO4)12(IO3)12·12H2O. It is…

Metacinnabar is the cubic form of mercury sulfide (HgS). It is a mercury sulfide mineral that has the same chemical composition as cinnabar (HgS). It…

Coesite is a very unusual mineral, and it is silica, silicon dioxide (SiO2), high-pressure polymorph (cristal form). It is produced when quartz is exposed to…