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Gedrite
Gedrite

Phlogopite
Phlogopite



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Gedrite
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Phlogopite

Gedrite and Phlogopite Optical Properties

Optical Properties

Luster

Vitreous
Pearly

Pleochroism

Weak to moderate
-

Dispersion

0.020.04
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

1.625-1.7181.530-1.573
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
monoclinic

Birefringence

-99990.0280-0.0450
0 0.296
👆🏻

Clarity

Transparent
-

Gedrite and Phlogopite Optic Character

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

Gedrite and Phlogopite Transparency

Similar to their colors, Gedrite and Phlogopite 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, Gedrite is Transparent while Gedrite is Transparent in appearance.