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Beryllonite
Beryllonite

Benitoite
Benitoite



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Beryllonite
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Benitoite

Beryllonite and Benitoite Optical Properties

Optical Properties

Luster

Vitreous, Adamantine, Pearly
Vitreous

Pleochroism

-
O = colorless; E = purple

Dispersion

0.010.04
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.552-1.5621.757-1.804
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Hexagonal

Birefringence

0.0090.047
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Beryllonite and Benitoite Optic Character

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

Similar to their colors, Beryllonite and Benitoite 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.