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Gedrite and Hibonite Optical Properties


Hibonite and Gedrite Optical Properties


Optical Properties

Luster
Fibrous, Vitreous   
Vitreous   

Pleochroism
Weak to moderate   
O = brownish gray; E = gray   

Dispersion
Not Available   
Not Available   

Transparency
Transparent   
Handbook of mineralogy (2001)   

Refractive Index
1.625-1.718   
1.79-1.807   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma   
Hexagonal   

Birefringence
Not Available   
Not Available   

Clarity
Transparent   
Handbook of mineralogy (2001)   

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Gedrite and Hibonite Optic Character

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

Similar to their colors, Gedrite 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, Gedrite is Transparent while Gedrite is Transparent in appearance.

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