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Emerald and Chrysoberyl Optical Properties


Chrysoberyl and Emerald Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Strong dichroism: yellow green Lazzarelli   
X = red; Y = yellow-orange; Z = emerald-green   

Dispersion
0.01   
26
0.02   
24

Transparency
Transparent, Translucent, Transparent to translucent   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.565-1.602   
1.746-1.763   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Hexagonal   
Orthorhombic   

Birefringence
0.0040-0.0070   
0.007-0.013   

Clarity
Color grading system   
Transparent   

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Emerald and Chrysoberyl Optic Character

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

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

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