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
-
Dispersion
0.030.15
0.005
1
👆🏻
Transparency
-
-
Refractive Index
1.672-1.688-9999
1
3.25
👆🏻
Optic Character
-
-
Crystal System
monoclinic
-
Birefringence
0.139-0.143-9999
0
0.296
👆🏻
Clarity
-
-