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Scheelite and Anhydrite Optical Properties


Anhydrite and Scheelite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine  
Pearly, Greasy  

Pleochroism
Definite dichoric in yellow (yellow to orange-brown)  
For violet varieties  

Dispersion
0.04  
36
0.01  
99+

Transparency
Translucent, Transparent  
Transparent  

Refractive Index
1.918-1.936  
1.570-1.614  

Optic Character
-  
-  

Crystal System
tetragonal  
Orthorhombic  

Birefringence
0.016  
0.042-0.044  

Clarity
Translucent  
Transparent  

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Scheelite and Anhydrite Optic Character

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

Similar to their colors, Scheelite and Anhydrite 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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