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Iolite and Rhyolite Optical Properties


Rhyolite and Iolite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
Not Available   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Transparent, Translucent, Transparent to translucent   
Not Available   

Refractive Index
1.52-1.56   
Not Available   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Trigonal   

Birefringence
Not Available   
Not Available   

Clarity
Transparent to translucent   
Not Available   

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<< Physical Properties

Iolite and Rhyolite Optic Character

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

Similar to their colors, Iolite and Rhyolite 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, Iolite is Translucent, Transparent and Transparent to translucent while Iolite is Translucent, Transparent and Transparent to translucent in appearance.

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