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Sugilite
Sugilite

Euclase
Euclase



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Sugilite
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Euclase

Sugilite and Euclase Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Weak
Weak: colorless-(greenish) yellow

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

1.607-1.6121.650-1.677
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

0.0030.019-0.025
0 0.296
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Clarity

Translucent
TransparentUlrich Henn and Claudio C. Milisenda

Sugilite and Euclase Optic Character

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

Sugilite and Euclase Transparency

Similar to their colors, Sugilite 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, Sugilite is Translucent while Sugilite is Translucent in appearance.