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Phlogopite
Phlogopite

Rosasite
Rosasite



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Phlogopite
X
Rosasite

Phlogopite and Rosasite Optical Properties

Optical Properties

Luster

Pearly
Silky, Vitreous

Pleochroism

-
Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue

Dispersion

0.040.03
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.530-1.5731.672-1.688
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
monoclinic

Birefringence

0.0280-0.04500.139-0.143
0 0.296
👆🏻

Clarity

-
-

Phlogopite and Rosasite Optic Character

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

Similar to their colors, Phlogopite and Rosasite 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.