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Phosgenite
Phosgenite

Witherite
Witherite



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Phosgenite
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Witherite

Phosgenite and Witherite Optical Properties

Optical Properties

Luster

Adamantine
Vitreous

Pleochroism

Weakly pleochroic with O reddish and E greenish in thick sections.
-

Dispersion

0.040.03
0.005 1
👆🏻

Transparency

-
Transparent, Translucent

Refractive Index

2.117-2.1451.529-1.680
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
-

Birefringence

0.0270.148
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Phosgenite and Witherite Optic Character

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

Phosgenite and Witherite Transparency

Similar to their colors, Phosgenite and Witherite 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, Phosgenite is while Phosgenite is in appearance.