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Neptunite and Pleonaste Optical Properties


Pleonaste 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)   

Refractive Index
1.692-1.734   
1.780   

Optic Character
Not Available   
Not Available   

Crystal System
monoclinic   
Not Available   

Birefringence
0.0294-0.0452   
Not Available   

Clarity
Translucent   
Gemmological Tables (2004)   

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Neptunite and Pleonaste Optic Character

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

Similar to their colors, Neptunite and Pleonaste 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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Red Gemstones


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