×

Powellite
Powellite

Phosgenite
Phosgenite



ADD
Compare
X
Powellite
X
Phosgenite

Powellite and Phosgenite Optical Properties

Optical Properties

Luster

Greasy, Subadamantine
Adamantine

Pleochroism

In deeply colored specimens: blue greenAnthony et al
Weakly pleochroic with O reddish and E greenish in thick sections.

Dispersion

0.030.04
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.974-1.9842.117-2.145
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
tetragonal

Birefringence

-99990.027
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Powellite and Phosgenite Optic Character

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

Similar to their colors, Powellite and Phosgenite 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.