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Cacoxenite
Cacoxenite

Polyhalite
Polyhalite



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Cacoxenite
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Polyhalite

Cacoxenite and Polyhalite Optical Properties

Optical Properties

Luster

Silky
Vitreous, Resinous

Pleochroism

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

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.575-1.5851.546-1.548
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Hexagonal
Triclinic

Birefringence

-99990.021
0 0.296
👆🏻

Clarity

-
-

Cacoxenite and Polyhalite Optic Character

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

Similar to their colors, Cacoxenite and Polyhalite 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.