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Vivianite
Vivianite

Wavellite
Wavellite



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Vivianite
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Wavellite

Vivianite and Wavellite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous, Resinous, Pearly

Pleochroism

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

Dispersion

0.030.02
0.005 1
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Transparency

Transparent
-

Refractive Index

1.560-1.6401.518-1.561
1 3.25
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Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

0.054-0.0750.025
0 0.296
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Clarity

Transparent
-

Vivianite and Wavellite Optic Character

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

Similar to their colors, Vivianite and Wavellite 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.