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Scheelite
Scheelite

Vivianite
Vivianite



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Scheelite
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Vivianite

Scheelite and Vivianite Optical Properties

Optical Properties

Luster

Vitreous, Adamantine
Vitreous, Pearly

Pleochroism

Definite dichoric in yellow (yellow to orange-brown)
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue

Dispersion

0.040.03
0.005 1
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Transparency

Translucent, Transparent
Transparent

Refractive Index

1.918-1.9361.560-1.640
1 3.25
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Optic Character

-
-

Crystal System

tetragonal
-

Birefringence

0.0160.054-0.075
0 0.296
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Clarity

Translucent
Transparent

Scheelite and Vivianite Optic Character

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

Scheelite and Vivianite Transparency

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