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Pollucite
Pollucite

Vivianite
Vivianite



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Pollucite
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Vivianite

Pollucite and Vivianite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
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, Translucent
Transparent

Refractive Index

1.517-1.5251.560-1.640
1 3.25
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Optic Character

-
-

Crystal System

Isometric
-

Birefringence

-99990.054-0.075
0 0.296
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Clarity

Transparent
Transparent

Pollucite and Vivianite Optic Character

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

Pollucite and Vivianite Transparency

Similar to their colors, Pollucite 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, Pollucite is Transparent and Translucent while Pollucite is Transparent and Translucent in appearance.