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Phosgenite
Phosgenite

Cordierite
Cordierite



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Phosgenite
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Cordierite

Phosgenite and Cordierite Optical Properties

Optical Properties

Luster

Adamantine
Greasy, Vitreous

Pleochroism

Weakly pleochroic with O reddish and E greenish in thick sections.
X = pale yellow

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

-
-

Refractive Index

2.117-2.145-9999
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
Orthorhombic

Birefringence

0.027-9999
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
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Phosgenite and Cordierite Optic Character

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

Similar to their colors, Phosgenite and Cordierite 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.