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Phlogopite
Phlogopite

Labradorite
Labradorite



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Phlogopite
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Labradorite

Phlogopite and Labradorite Optical Properties

Optical Properties

Luster

Pearly
Vitreous, Pearly

Pleochroism

-
-

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

-
Transparent, Translucent, Transparent to translucent

Refractive Index

1.530-1.5731.554-1.573
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Triclinic

Birefringence

0.0280-0.04500.008-0.010
0 0.296
👆🏻

Clarity

-
Transparent

Phlogopite and Labradorite Optic Character

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

Similar to their colors, Phlogopite and Labradorite 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.