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Melanite and Cordierite Iolite Optical Properties


Cordierite Iolite and Melanite Optical Properties


Optical Properties

Luster
Subadamantine, Vitreous   
Vitreous   

Pleochroism
Not Available   
Strong trichroism: colorless to yellowish   

Dispersion
0.06   
7
0.02   
22

Transparency
Translucent   
Transparent   

Refractive Index
1.855-1.895   
1.542-1.578   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Not Available   
Not Available   

Birefringence
Not Available   
0.008-0.012   

Clarity
Translucent   
Transparent   

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Melanite and Cordierite Iolite Optic Character

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

Similar to their colors, Melanite 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, Melanite is Translucent while Melanite is Translucent in appearance.

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