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Beryllonite
Beryllonite

Pleonaste
Pleonaste



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Beryllonite
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Pleonaste

Beryllonite and Pleonaste Optical Properties

Optical Properties

Luster

Vitreous, Adamantine, Pearly
-

Pleochroism

-
-

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.552-1.5621.780
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
-

Birefringence

0.009-9999
0 0.296
👆🏻

Clarity

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

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

Similar to their colors, Beryllonite and Pleonaste 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.