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Bustamite and Hercynite Optical Properties


Hercynite and Bustamite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Weak   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Transparent, Translucent   
Translucent   

Refractive Index
1.662-1.707   
1.80-1.83   

Optic Character
Not Available   
Not Available   

Crystal System
Triclinic   
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m   

Birefringence
0.013-0.015   
Not Available   

Clarity
Transparent   
Translucent   

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Bustamite and Hercynite Optic Character

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

Similar to their colors, Bustamite and Hercynite 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, Bustamite is Translucent and Transparent while Bustamite is Translucent and Transparent in appearance.

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Red Gemstones


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