Euclase and Emerald Optical Properties

Euclase

Emerald

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Optical Properties

Luster

Vitreous

Pleochroism

Weak: colorless-(greenish) yellow

Strong dichroism: yellow green Lazzarelli

Dispersion

0.020.01

0.005 1

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Transparency

Transparent, Translucent, Transparent to translucent

Refractive Index

1.650-1.6771.565-1.602

1 3.25

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Optic Character

Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

Hexagonal

Birefringence

0.019-0.0250.0040-0.0070

0 0.296

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Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Euclase and Emerald Optic Character

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

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Euclase and Emerald Transparency

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