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Common Opal
Common Opal

Carnallite
Carnallite



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Common Opal
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Carnallite

Common Opal and Carnallite Optical Properties

Optical Properties

Luster

-
Greasy

Pleochroism

-
-

Dispersion

0.010.02
0.005 1
👆🏻

Transparency

Translucent
-

Refractive Index

1.37-1.521.467
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

-99990.0270
0 0.296
👆🏻

Clarity

Translucent
-

Common Opal and Carnallite Optic Character

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

Common Opal and Carnallite Transparency

Similar to their colors, Common Opal and Carnallite 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, Common Opal is Translucent while Common Opal is Translucent in appearance.