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Nephrite and Scheelite Optical Properties


Scheelite and Nephrite Optical Properties


Optical Properties

Luster
Vitreous, Greasy   
Vitreous, Adamantine   

Pleochroism
None   
Definite dichoric in yellow (yellow to orange-brown)   

Dispersion
Not Available   
0.04   
12

Transparency
Translucent   
Translucent, Transparent   

Refractive Index
1.600-1.627   
1.918-1.936   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
tetragonal   

Birefringence
0.027   
0.016   

Clarity
Translucent   
Translucent   

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Nephrite and Scheelite Optic Character

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

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Nephrite and Scheelite Transparency

Similar to their colors, Nephrite 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, Nephrite is Translucent while Nephrite is Translucent in appearance.

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