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Precious Opal
Precious Opal

Euclase
Euclase



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Precious Opal
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Euclase

Precious Opal and Euclase Optical Properties

Optical Properties

Luster

-
Vitreous

Pleochroism

-
Weak: colorless-(greenish) yellow

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.370-1.4701.650-1.677
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

-99990.019-0.025
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Precious Opal and Euclase Optic Character

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

Precious Opal and Euclase Transparency

Similar to their colors, Precious Opal 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, Precious Opal is Transparent and Translucent while Precious Opal is Transparent and Translucent in appearance.