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Anhydrite
Anhydrite

Staurolite
Staurolite



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X
Anhydrite
X
Staurolite

Anhydrite and Staurolite Optical Properties

Optical Properties

Luster

Pearly, Greasy
Resinous

Pleochroism

For violet varieties
X = colorless; Y = pale yellow; Z = golden yellow

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.570-1.6141.736-1.762
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
monoclinic

Birefringence

0.042-0.0440.009-0.015
0 0.296
👆🏻

Clarity

Transparent
-

Anhydrite and Staurolite Optic Character

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

Similar to their colors, Anhydrite and Staurolite 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.