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Kyanite
Kyanite

Beryllonite
Beryllonite



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Kyanite
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Beryllonite

Kyanite and Beryllonite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous, Adamantine, Pearly

Pleochroism

Trichroic
-

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.71-1.741.552-1.562
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Triclinic
monoclinic

Birefringence

-99990.009
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Kyanite and Beryllonite Optic Character

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

Kyanite and Beryllonite Transparency

Similar to their colors, Kyanite and Beryllonite 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, Kyanite is while Kyanite is in appearance.