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Tortoiseshell and Iolite Optical Properties


Iolite and Tortoiseshell Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
Not Available   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Gemmological Tables (2004)   
Transparent, Translucent, Transparent to translucent   

Refractive Index
1.540-1.560   
1.52-1.56   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Orthorhombic   

Birefringence
Not Available   
Not Available   

Clarity
OpaqueUlrich Henn and Claudio C. Milisenda   
Transparent to translucent   

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Tortoiseshell and Iolite Optic Character

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

Similar to their colors, Tortoiseshell 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, Tortoiseshell is Gemmological Tables (2004) while Tortoiseshell is Gemmological Tables (2004) in appearance.

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