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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

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Adamantine
Definite dichoric in yellow (yellow to orange-brown)
0.04
Translucent, Transparent
1.918-1.936
-
tetragonal
0.016
Translucent
 
Vitreous, Pearly
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue
0.03
Transparent
1.560-1.640
-
-
0.054-0.075
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 Vs Vivianite 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 while Scheelite is in appearance.