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Hurlbutite and Almandine Optical Properties


Almandine and Hurlbutite Optical Properties


Optical Properties

Luster
Vitreous   
Greasy, Vitreous   

Pleochroism
Not Available   
None   

Dispersion
Not Available   
0.03   
15

Transparency
Transparent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.595-1.604   
1.770-1.820   

Optic Character
Not Available   
Not Available   

Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a   
cubic   

Birefringence
0.009   
Not Available   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Hurlbutite and Almandine Optic Character

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

Similar to their colors, Hurlbutite and Almandine 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, Hurlbutite is Transparent while Hurlbutite is Transparent in appearance.

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