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Chlorastrolite and Cordierite Iolite Optical Properties


Cordierite Iolite and Chlorastrolite Optical Properties


Optical Properties

Luster
Chatoyant   
Vitreous   

Pleochroism
NilArthur Thomas   
Strong trichroism: colorless to yellowish   

Dispersion
Not Available   
0.02   
22

Transparency
Gems   
Transparent   

Refractive Index
1.7   
1.542-1.578   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Not Available   
Not Available   

Birefringence
0.010   
0.008-0.012   

Clarity
Gems   
Transparent   

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Chlorastrolite and Cordierite Iolite Optic Character

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

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Chlorastrolite and Cordierite Iolite Transparency

Similar to their colors, Chlorastrolite and Cordierite Iolite 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, Chlorastrolite is Gems while Chlorastrolite is Gems in appearance.

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