×

Phlogopite
Phlogopite

Atacamite
Atacamite



ADD
Compare
X
Phlogopite
X
Atacamite

Phlogopite and Atacamite Optical Properties

Optical Properties

Luster

Pearly
Adamantine, Vitreous

Pleochroism

-
X = pale green; Y = yellow-green; Z = grass-green

Dispersion

0.040.03
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.530-1.5731.831
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Orthorhombic

Birefringence

0.0280-0.04500.049
0 0.296
👆🏻

Clarity

-
-

Phlogopite and Atacamite Optic Character

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

Similar to their colors, Phlogopite and Atacamite 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.