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Pollucite
Pollucite

Norbergite
Norbergite



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Pollucite
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Norbergite

Pollucite and Norbergite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Vitreous

Pleochroism

-
Pale yellow very pale yellow colorlessAnthony et al

Dispersion

0.010.02
0.005 1
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Transparency

Transparent, Translucent
Transparent

Refractive Index

1.517-1.5251.563-1.593
1 3.25
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Optic Character

-
-

Crystal System

Isometric
-

Birefringence

-9999-9999
0 0.296
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Clarity

Transparent
Transparent

Pollucite and Norbergite Optic Character

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

Pollucite and Norbergite Transparency

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