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Powellite
Powellite

Inderite
Inderite



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Powellite
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Inderite

Powellite and Inderite Optical Properties

Optical Properties

Luster

Greasy, Subadamantine
Vitreous, Pearly, Greasy

Pleochroism

In deeply colored specimens: blue greenAnthony et al
-

Dispersion

0.03-
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.974-1.9841.488-1.505
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

-
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

Birefringence

-99990.017
0 0.296
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Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Powellite and Inderite Optic Character

Powellite and Inderite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Powellite and Inderite 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 Inderite 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. Inderite has Biaxial/+ character.

Powellite and Inderite Transparency

Similar to their colors, Powellite and Inderite 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.