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Dravite
Dravite

Nephrite
Nephrite



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Dravite
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Nephrite

Dravite and Nephrite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous, Greasy

Pleochroism

Very strong: pale yellow colorless
None

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

Transparent
Translucent

Refractive Index

1.614-1.6661.600-1.627
1 3.25
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Optic Character

-
-

Crystal System

Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
monoclinic

Birefringence

0.014-0.0320.027
0 0.296
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Clarity

Transparent
Translucent

Dravite and Nephrite Optic Character

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

Dravite and Nephrite Transparency

Similar to their colors, Dravite and Nephrite 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, Dravite is Transparent while Dravite is Transparent in appearance.