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Dravite
Dravite
☒

Riebeckite
Riebeckite
☒



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X
Dravite
X
Riebeckite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Very strong: pale yellow colorless
0.02
Transparent
1.614-1.666
-
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
0.014-0.032
Transparent
 
Vitreous, Silky
X = blue
0.02
-
1.680-1.698
-
monoclinic
0.005-0.008
-

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