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Chiastolite and Alexandrite Optical Properties


Alexandrite and Chiastolite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
Not Available   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
Transparent, Transparent to nearly opaque   

Refractive Index
1.627-1.645   
1.739-1.770   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Not Available   
Orthorhombic   

Birefringence
0.007-0.013   
0.007-0.010   

Clarity
Translucent   
Transparent   

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Chiastolite and Alexandrite Optic Character

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

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Chiastolite and Alexandrite Transparency

Similar to their colors, Chiastolite and Alexandrite 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, Chiastolite is Translucent while Chiastolite is Translucent in appearance.

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