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Phlogopite
Phlogopite

Periclase
Periclase



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Phlogopite
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Periclase

Phlogopite and Periclase Optical Properties

Optical Properties

Luster

Pearly
Vitreous

Pleochroism

-
-

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

-
TransparentWalter Schumann

Refractive Index

1.530-1.5731.735-1.738
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Isometric

Birefringence

0.0280-0.0450-9999
0 0.296
👆🏻

Clarity

-
TransparentWalter Schumann

Phlogopite and Periclase Optic Character

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

Similar to their colors, Phlogopite and Periclase 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.