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Scheelite and Chrysoberyl Optical Properties


Chrysoberyl and Scheelite Optical Properties


Optical Properties

Luster
Vitreous, Adamantine  
Vitreous  

Pleochroism
Definite dichoric in yellow (yellow to orange-brown)  
X = red; Y = yellow-orange; Z = emerald-green  

Dispersion
0.04  
36
0.02  
99+

Transparency
Translucent, Transparent  
Transparent, Translucent, Transparent to translucent  

Refractive Index
1.918-1.936  
1.746-1.763  

Optic Character
-  
Biaxial/+  

Crystal System
tetragonal  
Orthorhombic  

Birefringence
0.016  
0.007-0.013  

Clarity
Translucent  
Transparent  

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Scheelite and Chrysoberyl Optic Character

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

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Scheelite and Chrysoberyl Transparency

Similar to their colors, Scheelite and Chrysoberyl 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.

Yellow Gemstones

Yellow Gemstones


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