Luster
Silky, Vitreous
-
Pleochroism
Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue
O = brownish red; E = yellowish red
Dispersion
0.030.05
0.005
1
👆🏻
Transparency
-
OpaqueHerve Nicolas Lazzarelli
Refractive Index
1.672-1.6882.690-3.220
1
3.25
👆🏻
Optic Character
-
-
Crystal System
monoclinic
Trigonal
Birefringence
0.139-0.1430.280
0
0.296
👆🏻
Clarity
-
OpaqueHerve Nicolas Lazzarelli