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Powellite
Powellite

Eudialyte
Eudialyte



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Eudialyte

Powellite and Eudialyte Optical Properties

Optical Properties

Luster

Greasy, Subadamantine
Vitreous

Pleochroism

In deeply colored specimens: blue greenAnthony et al
Weak: O= colorless

Dispersion

0.030.01
0.005 1
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Transparency

Transparent
Translucent

Refractive Index

1.974-1.9841.591-1.633
1 3.25
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Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

-99990.003-0.010
0 0.296
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Clarity

Transparent
Translucent

Powellite and Eudialyte Optic Character

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

Similar to their colors, Powellite and Eudialyte 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.