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Tanzanite
Tanzanite
☒

Celestine
Celestine
☒



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Tanzanite
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Celestine
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Present
0.03
Transparent, Translucent, Transparent to translucent
1.685-1.707
-
Orthorhombic
0.006-0.018
TransparentUlrich Henn and Claudio C. Milisenda
 
Vitreous, Pearly
Weakly trichroiC
0.01
-
1.619-1.635
-
Orthorhombic
0.004-0.012
-