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Hiddenite
Hiddenite

Vivianite
Vivianite



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Hiddenite
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Vivianite

Hiddenite and Vivianite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Pearly

Pleochroism

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

Dispersion

0.020.03
0.005 1
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Transparency

Transparent
Transparent

Refractive Index

1.657-1.6811.560-1.640
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
-

Birefringence

0.014-0.0160.054-0.075
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Hiddenite and Vivianite Optic Character

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

Hiddenite and Vivianite Transparency

Similar to their colors, Hiddenite 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, Hiddenite is Transparent while Hiddenite is Transparent in appearance.