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Beryl
Beryl

Anhydrite
Anhydrite



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Beryl
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Anhydrite

Beryl and Anhydrite Optical Properties

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Optical Properties

Luster

Vitreous, Resinous
Pearly, Greasy

Pleochroism

Weak to distinct
For violet varieties

Dispersion

0.010.01
0.005 1
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Transparency

Transparent, Transparent to opaque
Transparent

Refractive Index

1.560-1.6041.570-1.614
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
Orthorhombic

Birefringence

0.0040-0.00700.042-0.044
0 0.296
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Clarity

Transparent
Transparent

Beryl and Anhydrite Optic Character

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

Beryl and Anhydrite Transparency

Similar to their colors, Beryl 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, Beryl is Transparent and Transparent to opaque while Beryl is Transparent and Transparent to opaque in appearance.