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Sapphire and Inderite Optical Properties


Inderite and Sapphire Optical Properties


Optical Properties

Luster
Vitreous, Adamantine, Vitreous, Adamantine   
Vitreous, Pearly, Greasy   

Pleochroism
Strong   
Not Available   

Dispersion
0.02   
21
Not Available   

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

Refractive Index
1.762-1.788   
1.488-1.505   

Optic Character
Not Available   
Biaxial/+   

Crystal System
Trigonal   
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a   

Birefringence
0.008-0.009   
0.017   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Sapphire and Inderite Optic Character

Sapphire and Inderite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Sapphire and Inderite 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 Sapphire and Inderite 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. Inderite has Biaxial/+ character.

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Sapphire and Inderite Transparency

Similar to their colors, Sapphire and Inderite 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, Sapphire is Translucent, Transparent and Transparent to opaque while Sapphire is Translucent, Transparent and Transparent to opaque in appearance.

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