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Powellite
Powellite

Turquoise
Turquoise



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Powellite
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Turquoise

Powellite and Turquoise Optical Properties

Optical Properties

Luster

Greasy, Subadamantine
Waxy

Pleochroism

In deeply colored specimens: blue greenAnthony et al
Weak

Dispersion

0.030.03
0.005 1
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Transparency

Transparent
Translucent, Opaque

Refractive Index

1.974-1.9841.610-1.650
1 3.25
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Optic Character

-
-

Crystal System

-
Triclinic

Birefringence

-99990.040
0 0.296
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Clarity

Transparent
Translucent

Powellite and Turquoise Optic Character

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

Similar to their colors, Powellite and Turquoise 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.