Luster
Vitreous
-
Pleochroism
Weak or absentWalter Schumann
-
Dispersion
0.01-
0.005
1
👆🏻
Transparency
Transparent, Translucent, Transparent to translucent
-
Refractive Index
1.53-1.55-9999
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Triclinic
Trigonal
Birefringence
0.007-0.010-9999
0
0.296
👆🏻
Clarity
Transparent to translucent
-