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Scheelite
Scheelite

Vivianite
Vivianite



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Scheelite
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Vivianite

Scheelite and Vivianite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Adamantine
Vitreous, Pearly
1.2 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
1.3 Dispersion
0.04NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent, Transparent
Transparent
1.5 Refractive Index
1.918-1.9361.560-1.640
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
tetragonal
Not Available
1.8 Birefringence
0.0160.054-0.075
Achroite
0 0.296
1.9 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.