Emerald and Chalcedony Optical Properties

Emerald

Chalcedony

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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

Vitreous

Strong dichroism: yellow green Lazzarelli

0.01

Transparent, Translucent, Transparent to translucent

1.565-1.602

Hexagonal

0.0040-0.0070

Vitreous

0.01

Translucent, Translucent to opaque

1.530-1.543

Trigonal

0.003-0.009

Translucent

Emerald and Chalcedony Optic Character

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

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Emerald and Chalcedony Transparency

Similar to their colors, Emerald and Chalcedony 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, Emerald is Transparent, Translucent and Transparent to translucent while Emerald is Transparent, Translucent and Transparent to translucent in appearance.