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Pearl
Pearl

Anhydrite
Anhydrite



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Pearl
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Anhydrite

Pearl and Anhydrite Optical Properties

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Optical Properties

Luster

Pearly
Pearly, Greasy

Pleochroism

-
For violet varieties

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

Translucent, Opaque
Transparent

Refractive Index

1.52-1.661.570-1.614
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.1560.042-0.044
0 0.296
👆🏻

Clarity

Translucent
Transparent

Pearl and Anhydrite Optic Character

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

Pearl and Anhydrite Transparency

Similar to their colors, Pearl and Anhydrite 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, Pearl is Translucent and Opaque while Pearl is Translucent and Opaque in appearance.