Claudetite
Claudetite is an arsenic oxide mineral with chemical formula As2O3. It is a mineral consisting of a native arsenic trioxide As2O3 crystallizing in the monoclinic…
Geographic Minerals
Clarkeite: Properties and Occurrences
Clarkeite is a uranium oxide mineral of composition (Na, Ca, Pb)2(UO2)2(O, OH)3 or (Na, Ca, Pb)(UO2)O(OH)·0-1H2O. It is a rare dark brown radioactive mineral whose…
Cinnabar: Properties and Occurrences
Cinnabar is a bright red mineral consisting of mercury sulphide, sometimes used as a pigment. It refers to the common bright scarlet to a brick-red…
Chvaleticeite
Chvaleticeite is a monoclinic hexahydrite manganese magnesium sulfate mineral and soft monoclinic mineral with formula: (Mn2+, Mg)[SO4]·6(H2O). It occurs in the oxidized zone of manganese…
Chrysotile: Properties and Occurrences
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: Properties and OOccurrences
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: Properties and Occurrences
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: Properties and Occurrences
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
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: Properties and Occurrences
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: Properties and Occurrences
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: Properties and Occurrences
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.…
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