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Phlogopite
Phlogopite

Eosphorite
Eosphorite



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Phlogopite
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Eosphorite

Phlogopite and Eosphorite Optical Properties

Optical Properties

Luster

Pearly
Vitreous, Resinous

Pleochroism

-
Visible: X = yellow; Y = pink; Z = pale pink to colorless

Dispersion

0.040.01
0.005 1
👆🏻

Transparency

-
Transparent

Refractive Index

1.530-1.5731.639-1.672
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Orthorhombic

Birefringence

0.0280-0.04500.029-0.032
0 0.296
👆🏻

Clarity

-
Transparent

Phlogopite and Eosphorite Optic Character

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

Similar to their colors, Phlogopite and Eosphorite 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.