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Hurlbutite and Zinnwaldite Optical Properties


Zinnwaldite and Hurlbutite Optical Properties


Optical Properties

Luster
Vitreous   
Pearly, Vitreous   

Pleochroism
Not Available   
Distinct   

Dispersion
Not Available   
Not Available   

Transparency
Transparent   
Not Available   

Refractive Index
1.595-1.604   
1.565-1.625   

Optic Character
Not Available   
Not Available   

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

Birefringence
0.009   
0.040-0.050   

Clarity
Transparent   
Not Available   

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<< Physical Properties

Hurlbutite and Zinnwaldite Optic Character

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

Similar to their colors, Hurlbutite and Zinnwaldite 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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