Gemstone Chart |
Natural Dioptase Dioptase is an intense emerald-green to bluish-green copper cyclosilicate mineral.Dioptase is a rather unusual gemstone that will rarely be found in your basic jewelry stores. It is a beautiful gemstone with a very unusual combination of green colors. Color: Dark blue green, emerald green, or turquoise Categories: semi-precious stone Chemical Composition: CuSiO2(OH) 2 Crystal Group: Hexagonal Refractive Index: RI 1.644 ¨C 1.709 Hardness: 5 Density: 3.28 ¨C 3.55 Occurrence: Russia, Tsumeb Namibia, California and Colorado USA, Congo, Zaire, Chile
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