Science

Celadonite is a mica group mineral, a phyllosilicate of potassium, iron in both oxidation states, aluminum and hydroxide with the formula: K(Mg, Fe2+)(Fe3+, Al)[Si4O10](OH)2. It…

Cavansite, whose name is derived from its chemical composition, calcium vanadium silicate, is a deep blue hydrous calcium vanadium phyllosilicate mineral, occurring as a secondary…

Cattierite (CoS2) is a cobalt sulfide mineral found in the Democratic Republic of Congo. It is a mineral consisting of cobalt sulfide and belonging to…

Cassiterite is a tin oxide mineral, SnO2. It is a reddish, brownish, or yellowish mineral consisting of tin dioxide. It is the main ore of…

Caryopilite (synonymous with ectropite and ektropite) is a brown-colored mineral with formula (Mn2+, Mg)3Si2O5(OH)4. It is tiny brown-red spherules of caryopilite in clusters to <1mm…

Carrollite, CuCo2S4, is a sulfide of copper and cobalt, often with the substantial substitution of nickel for the metal ions, and a member of the…

Carpholite is a manganese silicate mineral with formula Mn2+Al2Si2O6(OH)4. It occurs as yellow clusters of slender prisms or needles. It crystallizes in the orthorhombic system.…

Carpathite (also known as pendletonite and karpatite) is a very rare hydrocarbon mineral. It is the mineral form of the polycyclic aromatic hydrocarbon coronene with the…

“Trigon” is Greek for the triangle, and “metric” is Greek for measurement. The trigonometric ratios are special measurements of a right triangle (a triangle with…

Carobbiite, chemical formula KF (potassium fluoride), is a rare, soft (Mohs 2 – 2.5), colorless cubic mineral. It consists of Potassium fluoride, a rare, soft,…

Carnotite is a potassium uranium vanadate radioactive mineral with chemical formula K2(UO2)2(VO4)2·3H2O. The water content can vary and small amounts of calcium, barium, magnesium, iron,…

Carnallite (also carnalite) is an evaporite mineral, a hydrated potassium magnesium chloride with formula KMgCl3·6(H2O). It was first described in 1856 from its type location…