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Hurlbutite and Lapis lazuli Optical Properties


Lapis lazuli and Hurlbutite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Greasy   

Pleochroism
Not Available   
AbsentWalter Schumann   

Dispersion
Not Available   
None   

Transparency
Transparent   
Opaque   

Refractive Index
1.595-1.604   
1.500-1.670   

Optic Character
Not Available   
Not Available   

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

Birefringence
0.009   
Not Available   

Clarity
Transparent   
Gemstones of the world (2001)   

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Hurlbutite and Lapis lazuli Optic Character

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

Similar to their colors, Hurlbutite and Lapis lazuli 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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