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Polyhalite and Musgravite Optical Properties


Musgravite and Polyhalite Optical Properties


Optical Properties

Luster
Vitreous, Resinous   
Vitreous   

Pleochroism
Not Available   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
Gemmological Tables (2004)   

Refractive Index
1.546-1.548   
1.719-1.739   

Optic Character
Not Available   
Not Available   

Crystal System
Triclinic   
Trigonal   

Birefringence
0.021   
0.014-0.016   

Clarity
Not Available   
TransparentUlrich Henn and Claudio C. Milisenda   

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Polyhalite and Musgravite Optic Character

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

Similar to their colors, Polyhalite and Musgravite 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, Polyhalite is Not Available while Polyhalite is Not Available in appearance.

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