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Phlogopite
Phlogopite

Cacoxenite
Cacoxenite



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Phlogopite
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Cacoxenite

Phlogopite and Cacoxenite Optical Properties

Optical Properties

Luster

Pearly
Silky

Pleochroism

-
visible: O = Pale yellow E = Canary yellow to yellow orange

Dispersion

0.040.03
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.530-1.5731.575-1.585
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Hexagonal

Birefringence

0.0280-0.0450-9999
0 0.296
👆🏻

Clarity

-
-

Phlogopite and Cacoxenite Optic Character

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

Phlogopite and Cacoxenite Transparency

Similar to their colors, Phlogopite and Cacoxenite 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, Phlogopite is while Phlogopite is in appearance.