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Dioptase and Iolite Optical Properties


Iolite and Dioptase Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Weak; dark emerald green   
Not Available   

Dispersion
0.04   
13
Not Available   

Transparency
TranslucentHerve Nicolas Lazzarelli   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.644-1.720   
1.52-1.56   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Orthorhombic   

Birefringence
0.051-0.053   
Not Available   

Clarity
TranslucentHerve Nicolas Lazzarelli   
Transparent to translucent   

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Dioptase and Iolite Optic Character

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

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Dioptase and Iolite Transparency

Similar to their colors, Dioptase and 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, Dioptase is TranslucentHerve Nicolas Lazzarelli while Dioptase is TranslucentHerve Nicolas Lazzarelli in appearance.

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