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Anorthite
Anorthite

Phosgenite
Phosgenite



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Anorthite
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Phosgenite

Anorthite and Phosgenite Optical Properties

Optical Properties

Luster

Vitreous
Adamantine

Pleochroism

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

Dispersion

0.010.04
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.575-1.5882.117-2.145
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Triclinic
tetragonal

Birefringence

0.012-0.0130.027
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Anorthite and Phosgenite Optic Character

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

Anorthite and Phosgenite Transparency

Similar to their colors, Anorthite 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, Anorthite is Transparent while Anorthite is Transparent in appearance.