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Nephrite
Nephrite

Omphacite
Omphacite



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Nephrite
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Omphacite

Nephrite and Omphacite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Vitreous

Pleochroism

None
Weak: colorless -- very pale green -- very pale green

Dispersion

0.010.02
0.005 1
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Transparency

Translucent
TranslucentAnthony et al

Refractive Index

1.600-1.6271.662-1.723
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
-

Birefringence

0.027-9999
0 0.296
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Clarity

Translucent
TranslucentAnthony et al

Nephrite and Omphacite Optic Character

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

Nephrite and Omphacite Transparency

Similar to their colors, Nephrite and Omphacite 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, Nephrite is Translucent while Nephrite is Translucent in appearance.