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Nephrite
Nephrite

Bastnasite
Bastnasite



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Nephrite
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Bastnasite

Nephrite and Bastnasite Optical Properties

Optical Properties

Luster

Vitreous, Greasy
Vitreous, Greasy, Pearly

Pleochroism

None
Faint

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

1.600-1.6271.717-1.722
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Hexagonal

Birefringence

0.0270.100
0 0.296
👆🏻

Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Nephrite and Bastnasite Optic Character

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

Similar to their colors, Nephrite and Bastnasite 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.