Properties & Information
Citrine
CitrineSCIENCE / MINERALOGYCitrine is the yellow to orange-brown variety of quartz, SiO₂. Natural citrine owes its color to iron-related defects and color centers within the quartz lattice. It crystallizes in...
Citrine
CitrineSCIENCE / MINERALOGYCitrine is the yellow to orange-brown variety of quartz, SiO₂. Natural citrine owes its color to iron-related defects and color centers within the quartz lattice. It crystallizes in...
Colorless Topaz
Colorless TopazSCIENCE / MINERALOGYColorless Topaz is transparent topaz without strong color-producing defects or trace-element effects. Topaz is an aluminum fluorosilicate, Al₂SiO₄(F,OH)₂, crystallizing in the orthorhombic system. It has a Mohs...
Colorless Topaz
Colorless TopazSCIENCE / MINERALOGYColorless Topaz is transparent topaz without strong color-producing defects or trace-element effects. Topaz is an aluminum fluorosilicate, Al₂SiO₄(F,OH)₂, crystallizing in the orthorhombic system. It has a Mohs...
Colombianite
ColombianiteSCIENCE / MINERALOGYColombianite is a trade name for dark natural glassy material found in Colombia. It is commonly described in the crystal trade as a tektite or impact glass, but...
Colombianite
ColombianiteSCIENCE / MINERALOGYColombianite is a trade name for dark natural glassy material found in Colombia. It is commonly described in the crystal trade as a tektite or impact glass, but...
Collawood
CollawoodSCIENCE / MINERALOGYCollawood is a modern trade name for silicified or petrified wood containing colorful secondary copper minerals. The fossilized wood framework is largely replaced by quartz or chalcedony, while...
Collawood
CollawoodSCIENCE / MINERALOGYCollawood is a modern trade name for silicified or petrified wood containing colorful secondary copper minerals. The fossilized wood framework is largely replaced by quartz or chalcedony, while...
Cobra Jasper
Cobra JasperSCIENCE / MINERALOGYCobra Jasper is a trade name applied to patterned jasper or chalcedony-rich material, commonly showing curved, orbicular, spotted, or snake-skin-like markings. The host is primarily microcrystalline silica,...
Cobra Jasper
Cobra JasperSCIENCE / MINERALOGYCobra Jasper is a trade name applied to patterned jasper or chalcedony-rich material, commonly showing curved, orbicular, spotted, or snake-skin-like markings. The host is primarily microcrystalline silica,...
Cobaltoan Calcite
Cobaltoan CalciteSCIENCE / MINERALOGYCobaltoan Calcite is a pink to magenta variety of calcite in which cobalt substitutes for some calcium in the CaCO₃ structure. It crystallizes in the trigonal system...
Cobaltoan Calcite
Cobaltoan CalciteSCIENCE / MINERALOGYCobaltoan Calcite is a pink to magenta variety of calcite in which cobalt substitutes for some calcium in the CaCO₃ structure. It crystallizes in the trigonal system...