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Piemontite and Hibonite Optical Properties


Hibonite and Piemontite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
visible   
O = brownish gray; E = gray   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
Handbook of mineralogy (2001)   

Refractive Index
1.725-1.756   
1.79-1.807   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Hexagonal   

Birefringence
0.025-0.076   
Not Available   

Clarity
Not Available   
Handbook of mineralogy (2001)   

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Piemontite and Hibonite Optic Character

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

Similar to their colors, Piemontite 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, Piemontite is Not Available while Piemontite is Not Available in appearance.

Red Gemstones

Red Gemstones


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