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Boracite
Boracite

Almandine
Almandine



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Boracite
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Almandine

Boracite and Almandine Optical Properties

Optical Properties

Luster

Vitreous, Adamantine
Greasy, Vitreous

Pleochroism

None
None

Dispersion

-0.03
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.658-1.6731.770-1.820
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
cubic

Birefringence

0.010-0.011-9999
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Boracite and Almandine Optic Character

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

Similar to their colors, Boracite and Almandine 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.