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Iolite and Labradorite Optical Properties


Labradorite and Iolite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Pearly   

Pleochroism
Not Available   
From the Congo   

Dispersion
Not Available   
0.01   
28

Transparency
Transparent, Translucent, Transparent to translucent   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.52-1.56   
1.554-1.573   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Triclinic   

Birefringence
Not Available   
0.008-0.010   

Clarity
Transparent to translucent   
Transparent   

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Iolite and Labradorite Optic Character

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

Similar to their colors, Iolite and Labradorite 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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