triclinic
Turquoise
CuAl6(PO4)4(OH)8.4H2O
Quick Facts
Hardness
5-6
Specific Gravity
2.60-2.85
Refractive Index
1.61-1.65
Crystal Structure
triclinic[-1]:{010}@1.0 + {001}@0.9 + {110}@0.7 triclinic
-1
{010} {001} {110}
Physical Properties
Crystal Systemtriclinic
Hardness (Mohs)5-6
Specific Gravity2.60-2.85
CleavageGood {001}, poor {010}
FractureConchoidal to smooth
LustreWaxy to sub-vitreous
Optical Properties
Refractive Index1.61-1.65
Birefringence0.04
PleochroismNone (typically aggregate)
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Open in Playground triclinic[-1]:{010}@1.0 + {001}@0.9 + {110}@0.7 Related Minerals
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