monoclinic
Malachite
Cu2(CO3)(OH)2
Quick Facts
Hardness
3.5-4
Specific Gravity
3.6-4.0
Refractive Index
1.655-1.909
Crystal Structure
monoclinic[2/m]:{110}@1.0 + {010}@0.7 + {100}@0.5 + {011}@0.4 monoclinic
2/m
{110} {010} {100} {011}
Physical Properties
Crystal Systemmonoclinic
Hardness (Mohs)3.5-4
Specific Gravity3.6-4.0
CleavagePerfect {201}, fair {010}
FractureSubconchoidal to uneven
LustreVitreous (crystals), silky to dull (massive)
Optical Properties
Refractive Index1.655-1.909
Birefringence0.245
PleochroismWeak (light green to dark green)
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Open in Playground monoclinic[2/m]:{110}@1.0 + {010}@0.7 + {100}@0.5 + {011}@0.4 Related Minerals
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