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Phlogopite
Phlogopite

Leucite
Leucite



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Phlogopite
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Leucite

Phlogopite and Leucite Optical Properties

Optical Properties

Luster

Pearly
Vitreous

Pleochroism

-
-

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.530-1.5731.504-1.510
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
tetragonal

Birefringence

0.0280-0.04500.001
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Phlogopite and Leucite Optic Character

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

Similar to their colors, Phlogopite and Leucite 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.