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Chrysocolla and Chrysoberyl Optical Properties


Chrysoberyl and Chrysocolla Optical Properties


Optical Properties

Luster
Vitreous, Greasy   
Vitreous   

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

Dispersion
None   
0.02   
24

Transparency
Opaque   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.460-1.570   
1.746-1.763   

Optic Character
Not Available   
Biaxial/+   

Crystal System
monoclinic   
Orthorhombic   

Birefringence
0.023-0.050   
0.007-0.013   

Clarity
Gemmological Tables (2004) More from other references   
Transparent   

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Chrysocolla and Chrysoberyl Optic Character

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

Similar to their colors, Chrysocolla 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, Chrysocolla is Opaque while Chrysocolla is Opaque in appearance.

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