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Scheelite and Mottramite Optical Properties


Mottramite and Scheelite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine  
Greasy  

Pleochroism
Definite dichoric in yellow (yellow to orange-brown)  
Visible X=Y= canary yellow to greenish yellow  

Dispersion
0.04  
36
0.04  
36

Transparency
Translucent, Transparent  
-  

Refractive Index
1.918-1.936  
2.170  

Optic Character
-  
-  

Crystal System
tetragonal  
Orthorhombic  

Birefringence
0.016  
0.150  

Clarity
Translucent  
-  

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Scheelite and Mottramite Optic Character

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

Similar to their colors, Scheelite and Mottramite 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.

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