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Riebeckite
Riebeckite

Phosgenite
Phosgenite



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Riebeckite
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Phosgenite

Riebeckite and Phosgenite Optical Properties

Optical Properties

Luster

Vitreous, Silky
Adamantine

Pleochroism

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

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.680-1.6982.117-2.145
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
tetragonal

Birefringence

0.005-0.0080.027
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Riebeckite and Phosgenite Optic Character

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

Riebeckite and Phosgenite Transparency

Similar to their colors, Riebeckite 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, Riebeckite is while Riebeckite is in appearance.