Geographic Minerals

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,…

Charlesite is a sulfate mineral of the ettringite group. It is a trigonal-ditrigonal pyramidal mineral containing aluminum, boron, calcium, hydrogen, oxygen, silicon, and sulfur. This…

Chapmanite is a rare silicate mineral belonging to the nesosilicate group, discovered in 1924, and named in honor of the late Edward John Chapman (1821–1904),…

Chaoite, or white carbon, is a mineral described as an allotrope of carbon whose existence is disputed. It is a supposed allotrope of carbon whose…

Changbaiite (Formula- PbNb2O) is a member of the oxide mineral class in which the mineral contains oxygen which is grouped along with one or two…