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Fire Opal
Fire Opal

Cacoxenite
Cacoxenite



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Fire Opal
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Cacoxenite

Fire Opal and Cacoxenite Optical Properties

Optical Properties

Luster

-
Silky

Pleochroism

-
visible: O = Pale yellow E = Canary yellow to yellow orange

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

Transparent, Translucent
-

Refractive Index

1.370-1.4701.575-1.585
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Hexagonal

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

Transparent
-

Fire Opal and Cacoxenite Optic Character

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

Fire Opal and Cacoxenite Transparency

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