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Phlogopite
Phlogopite

Alabaster
Alabaster



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Phlogopite
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Alabaster

Phlogopite and Alabaster Optical Properties

Optical Properties

Luster

Pearly
-

Pleochroism

-
-

Dispersion

0.04-
0.005 1
👆🏻

Transparency

-
Translucent

Refractive Index

1.530-1.5731.520-1.530
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
-

Birefringence

0.0280-0.04500.010
0 0.296
👆🏻

Clarity

-
Translucent

Phlogopite and Alabaster Optic Character

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

Similar to their colors, Phlogopite and Alabaster 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.