Norbergite and Powellite Optical Properties

Norbergite

Powellite

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1 Optical Properties

1.1 Luster

Vitreous

Greasy, Subadamantine

1.2 Pleochroism

Pale yellow very pale yellow colorlessAnthony et al

In deeply colored specimens: blue greenAnthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

1.5 Refractive Index

1.563-1.5931.974-1.984

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Transparent

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.