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Vivianite
Vivianite

Beryllonite
Beryllonite



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Vivianite
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Beryllonite

Vivianite and Beryllonite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous, Adamantine, Pearly

Pleochroism

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

Dispersion

0.030.01
0.005 1
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Transparency

Transparent
-

Refractive Index

1.560-1.6401.552-1.562
1 3.25
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Optic Character

-
-

Crystal System

-
monoclinic

Birefringence

0.054-0.0750.009
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Vivianite and Beryllonite Optic Character

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

Vivianite and Beryllonite Transparency

Similar to their colors, Vivianite and Beryllonite 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, Vivianite is Transparent while Vivianite is Transparent in appearance.