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Chrysoberyl and Danburite Optical Properties


Danburite and Chrysoberyl Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Greasy   

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

Dispersion
0.02   
24
0.02   
22

Transparency
Transparent, Translucent, Transparent to translucent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.746-1.763   
1.627-1.639   

Optic Character
Biaxial/+   
Biaxial/+   

Crystal System
Orthorhombic   
Orthorhombic   

Birefringence
0.007-0.013   
0.006   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Chrysoberyl and Danburite Optic Character

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

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Chrysoberyl and Danburite Transparency

Similar to their colors, Chrysoberyl and Danburite 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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