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Caledonite and Andalusite Optical Properties


Andalusite and Caledonite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Greasy   

Pleochroism
Weak   
strongly trichroic   

Dispersion
Not Available   
0.02   
23

Transparency
Transparent   
Transparent, Translucent   

Refractive Index
1.818-1.909   
1.627-1.650   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Orthorhombic   

Birefringence
0.091   
0.009-0.010   

Clarity
Transparent   
Transparent   

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Caledonite and Andalusite Optic Character

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

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Caledonite and Andalusite Transparency

Similar to their colors, Caledonite and Andalusite 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, Caledonite is Transparent while Caledonite is Transparent in appearance.

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