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Beryllonite
Beryllonite

Cacoxenite
Cacoxenite



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Beryllonite
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Cacoxenite

Beryllonite and Cacoxenite Optical Properties

Optical Properties

Luster

Vitreous, Adamantine, Pearly
Silky

Pleochroism

-
visible: O = Pale yellow E = Canary yellow to yellow orange

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.552-1.5621.575-1.585
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Hexagonal

Birefringence

0.009-9999
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
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Beryllonite and Cacoxenite Optic Character

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

Beryllonite and Cacoxenite Transparency

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