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Vivianite
Vivianite

Hiddenite
Hiddenite



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Vivianite
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Hiddenite

Vivianite and Hiddenite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous

Pleochroism

Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue
Distinct trichroism: yellow green green blue greenHerve Nicolas Lazzarelli

Dispersion

0.030.02
0.005 1
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Transparency

Transparent
Transparent

Refractive Index

1.560-1.6401.657-1.681
1 3.25
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Optic Character

-
-

Crystal System

-
monoclinic

Birefringence

0.054-0.0750.014-0.016
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Vivianite and Hiddenite Optic Character

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

Similar to their colors, Vivianite and Hiddenite 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.