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Nephrite
Nephrite

Mimetite
Mimetite



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Nephrite
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Mimetite

Nephrite and Mimetite Optical Properties

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Optical Properties

Luster

Vitreous, Greasy
Resinous, Subadamantine

Pleochroism

None
Weak

Dispersion

0.010.04
0.005 1
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Transparency

Translucent
Translucent

Refractive Index

1.600-1.6272.106-2.263
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Hexagonal

Birefringence

0.0270.019
0 0.296
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Clarity

Translucent
Translucent

Nephrite and Mimetite Optic Character

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

Similar to their colors, Nephrite and Mimetite 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.