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Phosgenite
Phosgenite

Kyanite
Kyanite



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Phosgenite
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Kyanite

Phosgenite and Kyanite Optical Properties

Optical Properties

Luster

Adamantine
Vitreous, Pearly

Pleochroism

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

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

2.117-2.1451.71-1.74
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
Triclinic

Birefringence

0.027-9999
0 0.296
👆🏻

Clarity

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

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

Similar to their colors, Phosgenite and Kyanite 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.