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Dominant species
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Dioptase
Chemical
Formula
CuSiO3·H2O
Species
Silicates
Crystal
System
Trigonal
Mohs
Scale
5
Specific
Gravity
3.28-3.35
Color
Dark blue green, emerald green
Streak
Green
Luster
Vitreous
Refractive
Index
n = 1.652 - 1.658 n = 1.704 - 1.710
Diaphaneity
Transparent, Translucent
Cleavage
PerfectPerfect on
Fracture
Irregular/Uneven, Conchoidal
Crystal Habit:Six sided prisms terminated by rhombohedrons to massive
Geological Setting:In the oxidized zone of some copper deposits.
Dioptase150
Dioptase150
Dioptase144
Dioptase144
Dioptase141
Dioptase141
Dioptase138
Dioptase138
Dioptase134
Dioptase134
Dioptase128
Dioptase128
Dioptase126
Dioptase126
Dioptase124
Dioptase124
Dioptase118
Dioptase118