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Selenite
Selenite

Atacamite
Atacamite



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X
Selenite
X
Atacamite

Optical Properties

Luster

Vitreous
Adamantine, Vitreous

Pleochroism

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

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

Transparent
-

Refractive Index

-99991.831
1 3.25
👆🏻

Optic Character

-
-

Crystal System

monoclinic
Orthorhombic

Birefringence

-99990.049
0 0.296
👆🏻

Clarity

Transparent
-