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Powellite
Powellite

Phenakite
Phenakite



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Powellite
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Phenakite

Powellite and Phenakite Optical Properties

Optical Properties

Luster

Greasy, Subadamantine
Vitreous

Pleochroism

In deeply colored specimens: blue greenAnthony et al
Distinct: colorless orangy-yellowHerve Nicolas Lazzarelli

Dispersion

0.030.02
0.005 1
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Transparency

Transparent
-

Refractive Index

1.974-1.9841.650-1.695
1 3.25
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Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

-99990.016
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Powellite and Phenakite Optic Character

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

Similar to their colors, Powellite and Phenakite 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.