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Chalcedony and Hibonite Optical Properties


Hibonite and Chalcedony Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
AbsentWalter Schumann   
O = brownish gray; E = gray   

Dispersion
None   
Not Available   

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

Refractive Index
1.530-1.543   
1.79-1.807   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Hexagonal   

Birefringence
0.003-0.009   
Not Available   

Clarity
Translucent   
Handbook of mineralogy (2001)   

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Chalcedony and Hibonite Optic Character

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

Similar to their colors, Chalcedony 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, Chalcedony is Translucent and Translucent to opaque while Chalcedony is Translucent and Translucent to opaque in appearance.

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