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Anhydrite
Anhydrite

Sapphire
Sapphire



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Anhydrite
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Sapphire

Anhydrite and Sapphire Optical Properties

Optical Properties

Luster

Pearly, Greasy
Vitreous, Adamantine

Pleochroism

For violet varieties
Strong

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Transparent
Transparent, Translucent, Transparent to opaque

Refractive Index

1.570-1.6141.762-1.788
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Trigonal

Birefringence

0.042-0.0440.008-0.009
0 0.296
👆🏻

Clarity

Transparent
Transparent

Anhydrite and Sapphire Optic Character

Anhydrite and Sapphire optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Anhydrite and Sapphire Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Anhydrite and Sapphire optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

Anhydrite and Sapphire Transparency

Similar to their colors, Anhydrite and Sapphire transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Anhydrite is Transparent while Anhydrite is Transparent in appearance.