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Gedrite
Gedrite

Powellite
Powellite



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Gedrite
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Powellite

Gedrite and Powellite Optical Properties

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Optical Properties

Luster

Vitreous
Greasy, Subadamantine

Pleochroism

Weak to moderate
In deeply colored specimens: blue greenAnthony et al

Dispersion

0.020.03
0.005 1
👆🏻

Transparency

Transparent
Transparent

Refractive Index

1.625-1.7181.974-1.984
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
-

Birefringence

-9999-9999
0 0.296
👆🏻

Clarity

Transparent
Transparent

Gedrite and Powellite Optic Character

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

Gedrite and Powellite Transparency

Similar to their colors, Gedrite and Powellite 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, Gedrite is Transparent while Gedrite is Transparent in appearance.