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Norbergite and Powellite Optical Properties


Powellite and Norbergite Optical Properties


Optical Properties

Luster
Vitreous   
Greasy, Subadamantine   

Pleochroism
Pale yellow very pale yellow colorlessAnthony et al   
In deeply colored specimens: blue greenAnthony et al   

Dispersion
Not Available   
Not Available   

Transparency
Transparent   
Transparent   

Refractive Index
1.563-1.593   
1.974-1.984   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Not Available   

Birefringence
Not Available   
Not Available   

Clarity
Transparent   
Transparent   

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Norbergite and Powellite Optic Character

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

Similar to their colors, Norbergite and Powellite 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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Yellow Gemstones


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