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Chrysoberyl and Variscite Optical Properties


Variscite and Chrysoberyl Optical Properties


Optical Properties

Luster
Vitreous  
Vitreous, Waxy  

Pleochroism
X = red; Y = yellow-orange; Z = emerald-green  
-  

Dispersion
0.02  
99+
0.01  
99+

Transparency
Transparent, Translucent, Transparent to translucent  
Translucent, Opaque . May be translucent when backlit on the edges.  

Refractive Index
1.746-1.763  
1.560-1.594  

Optic Character
Biaxial/+  
-  

Crystal System
Orthorhombic  
Orthorhombic  

Birefringence
0.007-0.013  
0.031  

Clarity
Transparent  
Translucent  

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Chrysoberyl and Variscite Optic Character

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

Similar to their colors, Chrysoberyl and Variscite 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, Chrysoberyl is Transparent, Translucent and Transparent to translucent while Chrysoberyl is Transparent, Translucent and Transparent to translucent in appearance.

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Green Gemstones


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