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Scheelite and Pargasite Optical Properties


Pargasite and Scheelite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine  
Vitreous  

Pleochroism
Definite dichoric in yellow (yellow to orange-brown)  
-  

Dispersion
0.04  
36
0.02  
99+

Transparency
Translucent, Transparent  
Transparent  

Refractive Index
1.918-1.936  
1.613-1.663  

Optic Character
-  
-  

Crystal System
tetragonal  
monoclinic  

Birefringence
0.016  
0.020  

Clarity
Translucent  
Transparent  

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Scheelite and Pargasite Optic Character

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

Similar to their colors, Scheelite and Pargasite 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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Yellow Gemstones


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