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Chiastolite and Foitite Optical Properties


Foitite and Chiastolite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
Not Available   
Strong: pale lavender dark blueAnthony et al   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
TranslucentAnthony et al, Translucent   

Refractive Index
1.627-1.645   
Not Available   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m   

Birefringence
0.007-0.013   
Not Available   

Clarity
Translucent   
TranslucentAnthony et al   

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Chiastolite and Foitite Optic Character

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

Similar to their colors, Chiastolite and Foitite 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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