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Anhydrite
Anhydrite

Nepouite
Nepouite



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Anhydrite
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Nepouite

Anhydrite and Nepouite Optical Properties

Optical Properties

Luster

Pearly, Greasy
Waxy, Pearly

Pleochroism

For violet varieties
Weak

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.570-1.6141.600-1.630
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.042-0.044-9999
0 0.296
👆🏻

Clarity

Transparent
-

Anhydrite and Nepouite Optic Character

Anhydrite and Nepouite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Anhydrite and Nepouite 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 Nepouite 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 Nepouite Transparency

Similar to their colors, Anhydrite and Nepouite 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.