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Agrellite
Agrellite

Phosgenite
Phosgenite



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Agrellite
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Phosgenite

Agrellite and Phosgenite Optical Properties

Optical Properties

Luster

Pearly
Adamantine

Pleochroism

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

Dispersion

0.010.04
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.5672.117-2.145
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Triclinic
tetragonal

Birefringence

0.0140.027
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Agrellite and Phosgenite Optic Character

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

Agrellite and Phosgenite Transparency

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