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Cordierite Iolite and Shattuckite Optical Properties


Shattuckite and Cordierite Iolite Optical Properties


Optical Properties

Luster
Vitreous   
Silky   

Pleochroism
Strong trichroism: colorless to yellowish   
X = very pale blue; Y = pale blue; Z = deep blue   

Dispersion
0.02   
22
Not Available   

Transparency
Transparent   
Translucent   

Refractive Index
1.542-1.578   
1.752-1.815   

Optic Character
Biaxial/+   
Not Available   

Crystal System
Not Available   
Orthorhombic   

Birefringence
0.008-0.012   
0.063   

Clarity
Transparent   
Translucent   

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Cordierite Iolite and Shattuckite Optic Character

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

Similar to their colors, Cordierite Iolite and Shattuckite 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, Cordierite Iolite is Transparent while Cordierite Iolite is Transparent in appearance.

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Blue Gemstones


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