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Powellite
Powellite

Verdite
Verdite



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Powellite
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Verdite

Powellite and Verdite Optical Properties

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Optical Properties

Luster

Greasy, Subadamantine
Vitreous, Silky

Pleochroism

In deeply colored specimens: blue greenAnthony et al
Extreme

Dispersion

0.030.03
0.005 1
👆🏻

Transparency

Transparent
Translucent

Refractive Index

1.974-1.9841.580
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c

Birefringence

-9999-9999
0 0.296
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Clarity

Transparent
Translucent

Powellite and Verdite Optic Character

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

Similar to their colors, Powellite and Verdite 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.