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Benitoite
Benitoite

Emerald
Emerald



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Benitoite
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Emerald

Benitoite and Emerald Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

O = colorless; E = purple
Strong dichroism: yellow green Lazzarelli

Dispersion

0.040.01
0.005 1
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Transparency

Transparent
Transparent, Translucent, Transparent to translucent

Refractive Index

1.757-1.8041.565-1.602
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
Hexagonal

Birefringence

0.0470.0040-0.0070
0 0.296
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Clarity

Transparent
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Benitoite and Emerald Optic Character

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

Similar to their colors, Benitoite and Emerald 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.