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Beryllonite
Beryllonite

Vivianite
Vivianite



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Beryllonite
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Vivianite

Beryllonite and Vivianite Optical Properties

Optical Properties

Luster

Vitreous, Adamantine, Pearly
Vitreous, Pearly

Pleochroism

-
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue

Dispersion

0.010.03
0.005 1
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Transparency

-
Transparent

Refractive Index

1.552-1.5621.560-1.640
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
-

Birefringence

0.0090.054-0.075
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Beryllonite and Vivianite Optic Character

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

Similar to their colors, Beryllonite and Vivianite 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.