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Smithsonite
Smithsonite

Neptunite
Neptunite



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Smithsonite
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Neptunite

Smithsonite and Neptunite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous

Pleochroism

-
x=yellow-orange

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

Translucent
Translucent

Refractive Index

1.620-1.8501.692-1.734
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
monoclinic

Birefringence

0.223-0.2270.0294-0.0452
0 0.296
👆🏻

Clarity

Translucent
Translucent

Smithsonite and Neptunite Optic Character

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

Smithsonite and Neptunite Transparency

Similar to their colors, Smithsonite 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, Smithsonite is Translucent while Smithsonite is Translucent in appearance.