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Neptunite and Parisite Optical Properties


Parisite and Neptunite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
x=yellow-orange   
Not Available   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.692-1.734   
1.671-1.771   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Not Available   

Birefringence
0.0294-0.0452   
0.099-0.100   

Clarity
Translucent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Neptunite and Parisite Optic Character

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

Similar to their colors, Neptunite and Parisite 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, Neptunite is Translucent while Neptunite is Translucent in appearance.

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