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Mellite
Mellite

Emerald
Emerald



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Mellite
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Emerald

Mellite and Emerald Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Weak: yellowish brown yellowAnthony et al
Strong dichroism: yellow green Lazzarelli

Dispersion

0.010.01
0.005 1
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Transparency

-
Transparent, Translucent, Transparent to translucent

Refractive Index

1.509-1.5411.565-1.602
1 3.25
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Optic Character

-
-

Crystal System

-
Hexagonal

Birefringence

0.0300.0040-0.0070
0 0.296
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Clarity

TransparentUlrich Henn and Claudio C. Milisenda
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Mellite and Emerald Optic Character

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

Mellite and Emerald Transparency

Similar to their colors, Mellite 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, Mellite is while Mellite is in appearance.