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Chrysoberyl and Ludlamite Optical Properties


Ludlamite and Chrysoberyl Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Pearly   

Pleochroism
X = red; Y = yellow-orange; Z = emerald-green   
NilArthur Thomas   

Dispersion
0.02   
24
Not Available   

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

Refractive Index
1.746-1.763   
1.653-1.693   

Optic Character
Biaxial/+   
Not Available   

Crystal System
Orthorhombic   
monoclinic   

Birefringence
0.007-0.013   
0.038-0.044   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Chrysoberyl and Ludlamite Optic Character

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

Similar to their colors, Chrysoberyl and Ludlamite 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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