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Chrysoberyl and Chrysoprase Optical Properties


Chrysoprase and Chrysoberyl Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Vitreous, Waxy   

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

Dispersion
0.02   
24
None   

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

Refractive Index
1.746-1.763   
1.530-1.543   

Optic Character
Biaxial/+   
Not Available   

Crystal System
Orthorhombic   
Trigonal   

Birefringence
0.007-0.013   
0.004   

Clarity
Transparent   
Translucent   

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Chrysoberyl and Chrysoprase Optic Character

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

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

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Green Gemstones


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