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Beryl
Beryl

Kyanite
Kyanite



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Beryl
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Kyanite

Beryl and Kyanite Optical Properties

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Optical Properties

Luster

Vitreous, Resinous
Vitreous, Pearly

Pleochroism

Weak to distinct
Trichroic

Dispersion

0.010.02
0.005 1
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Transparency

Transparent, Transparent to opaque
-

Refractive Index

1.560-1.6041.71-1.74
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
Triclinic

Birefringence

0.0040-0.0070-9999
0 0.296
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Clarity

Transparent
-

Beryl and Kyanite Optic Character

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

Similar to their colors, Beryl and Kyanite 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.