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Benitoite
Benitoite

Nephrite
Nephrite



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Benitoite
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Nephrite

Benitoite and Nephrite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Greasy

Pleochroism

O = colorless; E = purple
None

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

Transparent
Translucent

Refractive Index

1.757-1.8041.600-1.627
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
monoclinic

Birefringence

0.0470.027
0 0.296
👆🏻

Clarity

Transparent
Translucent

Benitoite and Nephrite Optic Character

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

Benitoite and Nephrite Transparency

Similar to their colors, Benitoite 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, Benitoite is Transparent while Benitoite is Transparent in appearance.