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Anhydrite
Anhydrite

Prase
Prase



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Anhydrite
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Prase

Anhydrite and Prase Optical Properties

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Optical Properties

Luster

Pearly, Greasy
-

Pleochroism

For violet varieties
-

Dispersion

0.010.01
0.005 1
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Transparency

Transparent
Transparent, Translucent

Refractive Index

1.570-1.6141.544-1.553
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
-

Birefringence

0.042-0.0440.009
0 0.296
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Clarity

Transparent
Transparent

Anhydrite and Prase Optic Character

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

Similar to their colors, Anhydrite and Prase 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.