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Jet and Hibonite Optical Properties


Jet
Hibonite and Jet Optical Properties


Optical Properties

Luster
Waxy   
Vitreous   

Pleochroism
AbsentWalter Schumann   
O = brownish gray; E = gray   

Dispersion
None   
Not Available   

Transparency
Gemmological Tables (2004) More from other references   
Handbook of mineralogy (2001)   

Refractive Index
1.640-1.680   
1.79-1.807   

Optic Character
Not Available   
Not Available   

Crystal System
Amorphous   
Hexagonal   

Birefringence
Not Available   
Not Available   

Clarity
Gemmological Tables (2004) More from other references   
Handbook of mineralogy (2001)   

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Jet and Hibonite Optic Character

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

Similar to their colors, Jet 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, Jet is Gemmological Tables (2004) More from other references while Jet is Gemmological Tables (2004) More from other references in appearance.

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