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Kyanite and Cordierite Iolite Optical Properties


Cordierite Iolite and Kyanite Optical Properties


Optical Properties

Luster
Vitreous, Pearly   
Vitreous   

Pleochroism
Trichroic   
Strong trichroism: colorless to yellowish   

Dispersion
Not Available   
0.02   
22

Transparency
Not Available   
Transparent   

Refractive Index
1.71-1.74   
1.542-1.578   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Triclinic   
Not Available   

Birefringence
Not Available   
0.008-0.012   

Clarity
Color grading system   
Transparent   

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Kyanite and Cordierite Iolite Optic Character

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

Similar to their colors, Kyanite 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, Kyanite is Not Available while Kyanite is Not Available in appearance.

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