Luster
Vitreous
-
Pleochroism
-
O = brownish red; E = yellowish red
Dispersion
0.010.05
0.005
1
👆🏻
Transparency
Transparent
OpaqueHerve Nicolas Lazzarelli
Refractive Index
1.562-1.6152.690-3.220
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Hexagonal
Trigonal
Birefringence
0.003-0.0100.280
0
0.296
👆🏻
Clarity
Transparent
OpaqueHerve Nicolas Lazzarelli