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Andradite
Andradite

Phosgenite
Phosgenite



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Andradite
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Phosgenite

Andradite and Phosgenite Optical Properties

Optical Properties

Luster

Adamantine, Resinous
Adamantine

Pleochroism

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

Dispersion

0.060.04
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.88-1.942.117-2.145
1 3.25
👆🏻

Optic Character

-
-

Crystal System

cubic
tetragonal

Birefringence

0.0570.027
0 0.296
👆🏻

Clarity

Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Andradite and Phosgenite Optic Character

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

Andradite and Phosgenite Transparency

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