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Euclase
Euclase

Adularia
Adularia



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Euclase
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Adularia

Euclase and Adularia Optical Properties

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Optical Properties

Luster

Vitreous
-

Pleochroism

Weak: colorless-(greenish) yellow
-

Dispersion

0.020.01
0.005 1
👆🏻

Transparency

-
TransparentArthur Thomas

Refractive Index

1.650-1.6771.518-1.536
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

0.019-0.0250.005-0.008
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
TransparentArthur Thomas

Euclase and Adularia Optic Character

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

Similar to their colors, Euclase and Adularia 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.