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Anthophyllite and Scheelite Optical Properties


Scheelite and Anthophyllite Optical Properties


Optical Properties

Luster
Vitreous, Pearly  
Vitreous, Adamantine  

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

Dispersion
0.01  
99+
0.04  
36

Transparency
Transparent  
Translucent, Transparent  

Refractive Index
1.603-1.690  
1.918-1.936  

Optic Character
Biaxial/+  
-  

Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma  
tetragonal  

Birefringence
-9999  
0.016  

Clarity
Transparent  
Translucent  

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Anthophyllite and Scheelite Optic Character

Anthophyllite and Scheelite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Anthophyllite 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 Anthophyllite 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. Anthophyllite has Biaxial/+ character.

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Anthophyllite and Scheelite Transparency

Similar to their colors, Anthophyllite 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, Anthophyllite is Transparent while Anthophyllite is Transparent in appearance.

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