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Hurlbutite and Ludlamite Optical Properties


Ludlamite and Hurlbutite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Pearly   

Pleochroism
Not Available   
NilArthur Thomas   

Dispersion
Not Available   
Not Available   

Transparency
Transparent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.595-1.604   
1.653-1.693   

Optic Character
Not Available   
Not Available   

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

Birefringence
0.009   
0.038-0.044   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Hurlbutite and Ludlamite Optic Character

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

Similar to their colors, Hurlbutite and Ludlamite 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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