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orthorhombic
Chrysoberyl (Trilling)
BeAl2O4
Quick Facts
Hardness
8.5
Specific Gravity
3.7
Refractive Index
1.746
Crystal Structure
orthorhombic[mmm]:{1-10}@1.0 + {110}@0.9 + {010}@0.5 + {001}@0.2 | twin(trilling) orthorhombic
mmm
{1-10} {110} {010} {001}
Physical Properties
Crystal Systemorthorhombic
Hardness (Mohs)8.5
Specific Gravity3.7
CleavageGood {110}, poor {010}
FractureConchoidal to uneven
LustreVitreous to subadamantine
Optical Properties
Refractive Index1.746
Birefringence0.008-0.010
PleochroismWeak to moderate (yellow-green, green shades)
Dispersion0.015
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Open in Playground orthorhombic[mmm]:{1-10}@1.0 + {110}@0.9 + {010}@0.5 + {001}@0.2 | twin(trilling) Related Minerals
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