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Beryllonite
Beryllonite

Chrysoberyl
Chrysoberyl



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Beryllonite
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Chrysoberyl

Beryllonite and Chrysoberyl Optical Properties

Optical Properties

Luster

Vitreous, Adamantine, Pearly
Vitreous

Pleochroism

-
X = red; Y = yellow-orange; Z = emerald-green

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

-
Transparent, Translucent, Transparent to translucent

Refractive Index

1.552-1.5621.746-1.763
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

monoclinic
Orthorhombic

Birefringence

0.0090.007-0.013
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Beryllonite and Chrysoberyl Optic Character

Beryllonite and Chrysoberyl optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Beryllonite and Chrysoberyl 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 Chrysoberyl 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. Chrysoberyl has Biaxial/+ character.

Beryllonite and Chrysoberyl Transparency

Similar to their colors, Beryllonite and Chrysoberyl 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.