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Faustite and Hibonite Optical Properties


Hibonite and Faustite Optical Properties


Optical Properties

Luster
Waxy   
Vitreous   

Pleochroism
Not Available   
O = brownish gray; E = gray   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
Handbook of mineralogy (2001)   

Refractive Index
1.612   
1.79-1.807   

Optic Character
Not Available   
Not Available   

Crystal System
Triclinic Pinacoidal H-M Symbol ( 1) Space Group: P1   
Hexagonal   

Birefringence
Not Available   
Not Available   

Clarity
Translucent   
Handbook of mineralogy (2001)   

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Faustite and Hibonite Optic Character

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

Similar to their colors, Faustite 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, Faustite is Translucent while Faustite is Translucent in appearance.

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