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Omphacite
Omphacite

Phosgenite
Phosgenite



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Omphacite
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Phosgenite

Omphacite and Phosgenite Optical Properties

Optical Properties

Luster

Vitreous
Adamantine

Pleochroism

Weak: colorless -- very pale green -- very pale green
Weakly pleochroic with O reddish and E greenish in thick sections.

Dispersion

0.020.04
0.005 1
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Transparency

TranslucentAnthony et al
-

Refractive Index

1.662-1.7232.117-2.145
1 3.25
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Optic Character

-
-

Crystal System

-
tetragonal

Birefringence

-99990.027
0 0.296
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Clarity

TranslucentAnthony et al
TransparentUlrich Henn and Claudio C. Milisenda

Omphacite and Phosgenite Optic Character

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

Omphacite and Phosgenite Transparency

Similar to their colors, Omphacite 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, Omphacite is TranslucentAnthony et al while Omphacite is TranslucentAnthony et al in appearance.