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Phlogopite
Phlogopite

Pyrope
Pyrope



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Phlogopite
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Pyrope

Phlogopite and Pyrope Optical Properties

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Optical Properties

Luster

Pearly
Greasy, Vitreous

Pleochroism

-
None

Dispersion

0.040.02
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.530-1.5731.720-1.756
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
cubic

Birefringence

0.0280-0.0450-9999
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Phlogopite and Pyrope Optic Character

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

Similar to their colors, Phlogopite and Pyrope 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.