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Beryllonite
Beryllonite

Riebeckite
Riebeckite



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Beryllonite
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Riebeckite

Beryllonite and Riebeckite Optical Properties

Optical Properties

Luster

Vitreous, Adamantine, Pearly
Vitreous, Silky

Pleochroism

-
X = blue

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.552-1.5621.680-1.698
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
monoclinic

Birefringence

0.0090.005-0.008
0 0.296
👆🏻

Clarity

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

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

Similar to their colors, Beryllonite and Riebeckite 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.