Luster
-
Vitreous
Pleochroism
O = brownish red; E = yellowish red
-
Dispersion
0.050.01
0.005
1
👆🏻
Transparency
OpaqueHerve Nicolas Lazzarelli
Transparent
Refractive Index
2.690-3.2201.590-1.599
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Trigonal
-
Birefringence
0.2800.009
0
0.296
👆🏻
Clarity
OpaqueHerve Nicolas Lazzarelli
Transparent