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Norbergite and Neptunite Optical Properties


Neptunite and Norbergite Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Pale yellow very pale yellow colorlessAnthony et al   
x=yellow-orange   

Dispersion
Not Available   
Not Available   

Transparency
Transparent   
Translucent   

Refractive Index
1.563-1.593   
1.692-1.734   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
monoclinic   

Birefringence
Not Available   
0.0294-0.0452   

Clarity
Transparent   
Translucent   

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Norbergite and Neptunite Optic Character

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

Similar to their colors, Norbergite and Neptunite 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, Norbergite is Transparent while Norbergite is Transparent in appearance.

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