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Anhydrite
Anhydrite

Norbergite
Norbergite



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Anhydrite
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Norbergite

Anhydrite and Norbergite Optical Properties

Optical Properties

Luster

Pearly, Greasy
Vitreous

Pleochroism

For violet varieties
Pale yellow very pale yellow colorlessAnthony et al

Dispersion

0.010.02
0.005 1
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Transparency

Transparent
Transparent

Refractive Index

1.570-1.6141.563-1.593
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
-

Birefringence

0.042-0.044-9999
0 0.296
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Clarity

Transparent
Transparent

Anhydrite and Norbergite Optic Character

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

Similar to their colors, Anhydrite and Norbergite 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.