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Benitoite
Benitoite

Beryllonite
Beryllonite



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Benitoite
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Beryllonite

Benitoite and Beryllonite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Adamantine, Pearly

Pleochroism

O = colorless; E = purple
-

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.757-1.8041.552-1.562
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
monoclinic

Birefringence

0.0470.009
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Benitoite and Beryllonite Optic Character

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

Benitoite and Beryllonite Transparency

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