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Anhydrite
Anhydrite

Antigorite
Antigorite



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Anhydrite
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Antigorite

Anhydrite and Antigorite Optical Properties

Optical Properties

Luster

Pearly, Greasy
Waxy, Silky, Resinous, Greasy

Pleochroism

For violet varieties
pale greenish yellow

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Transparent
Translucent

Refractive Index

1.570-1.6141.530-1.575
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Monoclinic Domatic H-M Symbol (m) Space Group: Cm

Birefringence

0.042-0.044-9999
0 0.296
👆🏻

Clarity

Transparent
Translucent

Anhydrite and Antigorite Optic Character

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

Similar to their colors, Anhydrite and Antigorite 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.