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Vivianite
Vivianite

Scheelite
Scheelite



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Vivianite
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Scheelite

Vivianite and Scheelite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Vitreous, Adamantine
1.2 Pleochroism
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue
Definite dichoric in yellow (yellow to orange-brown)
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
0.04
Rank: 12 (Overall)
Fluorite Optical Properties
1.4 Transparency
Transparent
Translucent, Transparent
1.5 Refractive Index
1.560-1.640
1.918-1.936
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
tetragonal
1.8 Birefringence
0.054-0.075
0.016
1.9 Clarity
Transparent
Translucent

Vivianite and Scheelite Optic Character

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

Similar to their colors, Vivianite and Scheelite 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.