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Powellite
Powellite

Ulexite
Ulexite



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Powellite
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Ulexite

Powellite and Ulexite Optical Properties

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Optical Properties

Luster

Greasy, Subadamantine
-

Pleochroism

In deeply colored specimens: blue greenAnthony et al
-

Dispersion

0.030.06
0.005 1
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Transparency

Transparent
Transparent

Refractive Index

1.974-1.9841.491-1.520
1 3.25
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Optic Character

-
-

Crystal System

-
-

Birefringence

-99990.029
0 0.296
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Clarity

Transparent
Transparent

Powellite and Ulexite Optic Character

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

Similar to their colors, Powellite and Ulexite 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.