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Hibonite and Sapphire Optical Properties


Sapphire and Hibonite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Adamantine, Vitreous, Adamantine   

Pleochroism
O = brownish gray; E = gray   
Strong   

Dispersion
Not Available   
0.02   
21

Transparency
Handbook of mineralogy (2001)   
Transparent, Translucent, Transparent to opaque   

Refractive Index
1.79-1.807   
1.762-1.788   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Trigonal   

Birefringence
Not Available   
0.008-0.009   

Clarity
Handbook of mineralogy (2001)   
Transparent   

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Hibonite and Sapphire Optic Character

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

Similar to their colors, Hibonite and Sapphire 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, Hibonite is Handbook of mineralogy (2001) while Hibonite is Handbook of mineralogy (2001) in appearance.

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