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Andradite
Andradite

Phlogopite
Phlogopite



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Andradite
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Phlogopite

Andradite and Phlogopite Optical Properties

Optical Properties

Luster

Adamantine, Resinous
Pearly

Pleochroism

-
-

Dispersion

0.060.04
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.88-1.941.530-1.573
1 3.25
👆🏻

Optic Character

-
-

Crystal System

cubic
monoclinic

Birefringence

0.0570.0280-0.0450
0 0.296
👆🏻

Clarity

Transparent
-

Andradite and Phlogopite Optic Character

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

Similar to their colors, Andradite and Phlogopite 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.