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Smoky Quartz and Cordierite Iolite Optical Properties


Cordierite Iolite and Smoky Quartz Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
None   
Strong trichroism: colorless to yellowish   

Dispersion
0.01   
27
0.02   
22

Transparency
Transparent, Translucent, Transparent to translucent   
Transparent   

Refractive Index
1.544-1.553   
1.542-1.578   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Hexagonal   
Not Available   

Birefringence
0.009   
0.008-0.012   

Clarity
Opaque   
Transparent   

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Smoky Quartz and Cordierite Iolite Optic Character

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

Similar to their colors, Smoky Quartz 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, Smoky Quartz is Translucent, Transparent and Transparent to translucent while Smoky Quartz is Translucent, Transparent and Transparent to translucent in appearance.

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