triclinic
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
Quick Facts
Hardness
5.5
Specific Gravity
3.4
Refractive Index
1.711
Crystal Structure
triclinic[-1]:{110}@1.0 + {010}@0.8 + {001}@0.6 triclinic
-1
{110} {010} {001}
Physical Properties
Crystal Systemtriclinic
Hardness (Mohs)5.5
Specific Gravity3.4
CleavagePerfect prismatic {110}, nearly 90 degrees
FractureConchoidal to uneven
LustreVitreous to pearly
Optical Properties
Refractive Index1.711
Birefringence0.011-0.014
PleochroismWeak (yellowish-red, pinkish-red, pale yellowish-red)
Dispersion0.01
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