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Euclase
Euclase

Glaucophane
Glaucophane



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Euclase
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Glaucophane

Euclase and Glaucophane Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Pearly

Pleochroism

Weak: colorless-(greenish) yellow
Strong

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.650-1.6771.606-1.637
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.019-0.025-9999
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
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Euclase and Glaucophane Optic Character

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

Euclase and Glaucophane Transparency

Similar to their colors, Euclase and Glaucophane 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.