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Cacoxenite
Cacoxenite

Opal
Opal



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Cacoxenite
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Opal

Cacoxenite and Opal Optical Properties

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Optical Properties

Luster

Silky
Vitreous, Pearly

Pleochroism

visible: O = Pale yellow E = Canary yellow to yellow orange
None

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

-
Transparent, Translucent, Transparent to translucent

Refractive Index

1.575-1.5851.37-1.52
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
Trigonal

Birefringence

-9999-9999
0 0.296
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Clarity

-
Transparent

Cacoxenite and Opal Optic Character

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

Cacoxenite and Opal Transparency

Similar to their colors, Cacoxenite and Opal 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, Cacoxenite is while Cacoxenite is in appearance.