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Boracite
Boracite

Anhydrite
Anhydrite



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Boracite
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Anhydrite

Boracite and Anhydrite Optical Properties

Optical Properties

Luster

Vitreous, Adamantine
Pearly, Greasy

Pleochroism

None
For violet varieties

Dispersion

-0.01
0.005 1
👆🏻

Transparency

Transparent
Transparent

Refractive Index

1.658-1.6731.570-1.614
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
Orthorhombic

Birefringence

0.010-0.0110.042-0.044
0 0.296
👆🏻

Clarity

Transparent
Transparent

Boracite and Anhydrite Optic Character

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

Boracite and Anhydrite Transparency

Similar to their colors, Boracite 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, Boracite is Transparent while Boracite is Transparent in appearance.