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Powellite
Powellite

Staurolite
Staurolite



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Powellite
X
Staurolite

Powellite and Staurolite Optical Properties

Optical Properties

Luster

Greasy, Subadamantine
Resinous

Pleochroism

In deeply colored specimens: blue greenAnthony et al
X = colorless; Y = pale yellow; Z = golden yellow

Dispersion

0.030.02
0.005 1
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Transparency

Transparent
-

Refractive Index

1.974-1.9841.736-1.762
1 3.25
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Optic Character

-
-

Crystal System

-
monoclinic

Birefringence

-99990.009-0.015
0 0.296
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Clarity

Transparent
-

Powellite and Staurolite Optic Character

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

Similar to their colors, Powellite and Staurolite 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.