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Beryl
Beryl

Euclase
Euclase



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Beryl
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Euclase

Beryl and Euclase Optical Properties

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Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

Weak to distinct
Weak: colorless-(greenish) yellow

Dispersion

0.010.02
0.005 1
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Transparency

Transparent, Transparent to opaque
-

Refractive Index

1.560-1.6041.650-1.677
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

0.0040-0.00700.019-0.025
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Beryl and Euclase Optic Character

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

Beryl and Euclase Transparency

Similar to their colors, Beryl and Euclase 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, Beryl is Transparent and Transparent to opaque while Beryl is Transparent and Transparent to opaque in appearance.