Creedite: Properties and Occurrences
Creedite is a calcium aluminum sulfate fluoro hydroxide mineral with formula: Ca3Al2SO4(F, OH)10·2(H2O). It is a monoclinic-prismatic mineral containing aluminum, calcium, fluorine, hydrogen, oxygen, and…
Geographic Minerals
Coyoteite: Properties and Occurrences
Coyoteite is a hydrated sodium iron sulfide mineral. It is a triclinic black mineral containing hydrogen, iron, oxygen, sodium, and sulfur. It is moderately magnetic.…
Covellite: Properties and Occurrences
Covellite (also known as covelline) is a rare copper sulfide mineral with the formula CuS. It is a blue mineral consisting of copper sulphide, typically…
Cotunnite: Properties and Occurrences
Cotunnite is the natural mineral form of lead(II) chloride with formula PbCl2. It is a mineral form of lead chloride formed by alteration of Galena.…
Corundum: Properties and Occurrences
Corundum is a crystalline form of aluminum oxide (Al2O3) typically containing traces of iron, titanium, vanadium, and chromium. It is the third hardest natural mineral…
Cornwallite: Properties and Occurrences
Cornwallite is an uncommon copper arsenate mineral with formula Cu5(AsO4)2(OH)4. It is a mineral consisting of a basic copper arsenate resembling malachite. It was first…
Cornubite
Cornubite is a rare secondary copper arsenate mineral with formula: Cu5(AsO4)2(OH)4. It is a mineral containing arsenic, copper, hydrogen, and oxygen. These crystals are very…
Corkite: Properties and Occurrences
Corkite is a phosphate mineral in the beudantite subgroup of the alunite group. It is a phosphate-sulfate-hydroxide of lead and iron [formula- PbFe[(OH)6:SO4:PO4] that is…
Cordierite: Properties and Occurrences
Cordierite (mineralogy) or iolite (gemology) is a magnesium iron aluminum cyclosilicate. It is not a well known or popular mineral for mineral collectors. However, its…
Corderoite: Properties and Occurrences
Corderoite is an extremely rare mercury sulfide chloride mineral with formula Hg3S2Cl2. It is an isometric-tetartoidal mineral containing chlorine, mercury, and sulfur. Corderoite occurs as…
Native Copper
Native copper is an uncombined form of copper that occurs as a natural mineral. It has high electrical and thermal conductivity and also very malleable. Copper…
Copiapite: Properties and Occurrences
Copiapite is a hydrated iron sulfate mineral with formula: Fe2+Fe43+(SO4)6(OH)2.20H2O. It is a secondary mineral that forms from the oxidation of iron sulfide deposits. It…
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