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Neptunite
Neptunite

Pollucite
Pollucite



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Neptunite
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Pollucite

Neptunite and Pollucite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Greasy

Pleochroism

x=yellow-orange
-

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

Translucent
Transparent, Translucent

Refractive Index

1.692-1.7341.517-1.525
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Isometric

Birefringence

0.0294-0.0452-9999
0 0.296
👆🏻

Clarity

Translucent
Transparent

Neptunite and Pollucite Optic Character

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

Neptunite and Pollucite Transparency

Similar to their colors, Neptunite and Pollucite 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.