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Nephrite
Nephrite

Gahnospinel
Gahnospinel



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Nephrite
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Gahnospinel

Nephrite and Gahnospinel Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Vitreous

Pleochroism

None
-

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

1.600-1.6271.735-1.790
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Isometric

Birefringence

0.027-9999
0 0.296
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Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Nephrite and Gahnospinel Optic Character

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

Similar to their colors, Nephrite and Gahnospinel 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.