Geographic Minerals

Chrysotile or white asbestos is the most common serpentine asbestos used commercially and has long curly and pliable fibers. It is the most commonly encountered…

Chrysocolla is a hydrated copper phyllosilicate mineral with formula: Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (x<1) or (Cu, Al)2H2SiO5(OH)4·nH2O. It is a greenish-blue mineral consisting of hydrated copper silicate, occurring…

Cymophane Translucent yellowish chatoyant chrysoberyl is called cymophane or cat’s eye. It is a yellow or green opalescent variety of chrysoberyl. Cymophane has its derivation…

Alexandrite The alexandrite variety displays a color change (alexandrite effect) dependent upon the nature of ambient lighting. Its glamorous history and beauty have likely contributed…

Chrysoberyl The mineral or gemstone chrysoberyl is an aluminate of beryllium with the formula BeAl2O4. It is a hard, tough, and durable gem. Although lacking…

Chromium is a chemical element with symbol Cr and atomic number 24. It is a lustrous, brittle, hard metal. Its color is silver-gray and it…

Chromite is an iron chromium oxide: FeCr2O4. It is the principal ore of chromium, a brownish-black oxide of chromium and iron. It is an oxide…

Christite is a mineral with the chemical formula TlHgAsS3. It is a monoclinic-prismatic mineral containing arsenic, mercury, sulfur, and thallium. It is named after Dr.…

Chrisstanleyite, Ag2Pd3Se4, is a selenide mineral that crystallizes in high saline, the acidic hydrothermal solution at low temperatures as part of selenide vein inclusions in…

Chondrodite is a nesosilicate mineral with formula (Mg, Fe)5(SiO4)2(F, OH, O)2. It is the most common and most well-known member of the Humite Group of…

Chloroxiphite is a rare olive green to pistacio green lead copper halide mineral with formula: Pb3CuO2Cl2(OH)2. It was first discovered in 1923 in the Mendip…

Chlorocalcite is a rare potassium calcium chloride evaporite mineral with formula: KCaCl3. It is found in active volcanic fumaroles. A rare white mineral found in…