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Powellite
Powellite

Jasper
Jasper



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Jasper

Powellite and Jasper Optical Properties

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Optical Properties

Luster

Greasy, Subadamantine
Vitreous

Pleochroism

In deeply colored specimens: blue greenAnthony et al
-

Dispersion

0.030.01
0.005 1
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Transparency

Transparent
Opaque

Refractive Index

1.974-1.9841.540
1 3.25
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Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

-9999-9999
0 0.296
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Clarity

Transparent
OpaqueHerve Nicolas Lazzarelli

Powellite and Jasper Optic Character

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

Similar to their colors, Powellite and Jasper 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.