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Benitoite and Hibonite Optical Properties


Hibonite and Benitoite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
O = colorless; E = purple   
O = brownish gray; E = gray   

Dispersion
0.04   
11
Not Available   

Transparency
Transparent   
Handbook of mineralogy (2001)   

Refractive Index
1.757-1.804   
1.79-1.807   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Hexagonal   

Birefringence
0.047   
Not Available   

Clarity
Transparent   
Handbook of mineralogy (2001)   

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Benitoite and Hibonite Optic Character

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

Similar to their colors, Benitoite and Hibonite 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, Benitoite is Transparent while Benitoite is Transparent in appearance.

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