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Powellite
Powellite

Cacoxenite
Cacoxenite



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Powellite
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Cacoxenite

Powellite and Cacoxenite Optical Properties

Optical Properties

Luster

Greasy, Subadamantine
Silky

Pleochroism

In deeply colored specimens: blue greenAnthony et al
visible: O = Pale yellow E = Canary yellow to yellow orange

Dispersion

0.030.03
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.974-1.9841.575-1.585
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Hexagonal

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

Transparent
-

Powellite and Cacoxenite Optic Character

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

Powellite and Cacoxenite Transparency

Similar to their colors, Powellite 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, Powellite is Transparent while Powellite is Transparent in appearance.