Geographic Minerals

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…

Chlormayenite (after Mayen, Germany), Ca12Al14O32[☐4Cl2], is a rare calcium aluminum oxide mineral of cubic symmetry. It was originally reported from Eifel volcanic complex (Germany) in…

Chloritoid is a silicate mineral of metamorphic origin. It is an iron-magnesium manganese alumino-silicate hydroxide with the formula: (Fe, Mg, Mn)2Al4Si2O10(OH)4. It is a silicate…

The chlorites are a group of phyllosilicate minerals. It is a general name for several minerals that are difficult to distinguish by ordinary methods. The…

Chlorargyrite is the mineral form of silver chloride (AgCl). It forms isolated and fleetingly small but rich deposits of silver ore. It is relatively common…

Chibaite is a rare silicate mineral. It is a silica clathrate with formula SiO2·n(CH4, C2H6, C3H8,i-C4H10) (n = 3/17 (max)). It is a silica mineral…

Chesterite [(Mg, Fe)17Si20O54(OH)6] is a rare silicate mineral that can be compared to amphiboles, micas, and jimthompsonite. It is a basic inosilicate of magnesium and…

Chatkalite is a copper, iron, tin sulfide mineral with formula Cu6Fe2+Sn6S8. It is a tetragonal-scalenohedral pale rose mineral containing copper, iron, sulfur, and tin. It…

Charoite [K(Ca, Na)2Si4O10(OH, F)·H2O] is a rare silicate mineral, first described in 1978 and named for the Chara River. It is a stone of manifestation,…