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Carnelian and Chrysoberyl Optical Properties


Chrysoberyl and Carnelian Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

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

Dispersion
None   
0.02   
24

Transparency
Translucent, Transparent to nearly opaque   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.535-1.539   
1.746-1.763   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Trigonal   
Orthorhombic   

Birefringence
0.003-0.009   
0.007-0.013   

Clarity
Translucent   
Transparent   

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Carnelian and Chrysoberyl Optic Character

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

Similar to their colors, Carnelian 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, Carnelian is Translucent and Transparent to nearly opaque while Carnelian is Translucent and Transparent to nearly opaque in appearance.

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