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Phlogopite
Phlogopite

Adamite
Adamite



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Phlogopite
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Adamite

Phlogopite and Adamite Optical Properties

Optical Properties

Luster

Pearly
Vitreous

Pleochroism

-
-

Dispersion

0.040.06
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.530-1.5731.708-1.722
1 3.25
👆🏻

Optic Character

-
Biaxial/+

Crystal System

monoclinic
Orthorhombic

Birefringence

0.0280-0.04500.031-0.050
0 0.296
👆🏻

Clarity

-
Transparent

Phlogopite and Adamite Optic Character

Phlogopite and Adamite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Phlogopite and Adamite 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 Adamite 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. Adamite has Biaxial/+ character.

Phlogopite and Adamite Transparency

Similar to their colors, Phlogopite and Adamite 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.