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Atacamite
Atacamite

Beryllonite
Beryllonite



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Atacamite
X
Beryllonite

Atacamite and Beryllonite Optical Properties

Optical Properties

Luster

Adamantine, Vitreous
Vitreous, Adamantine, Pearly

Pleochroism

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

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

-
-

Refractive Index

1.8311.552-1.562
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Orthorhombic
monoclinic

Birefringence

0.0490.009
0 0.296
👆🏻

Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Atacamite and Beryllonite Optic Character

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

Atacamite and Beryllonite Transparency

Similar to their colors, Atacamite and Beryllonite 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, Atacamite is while Atacamite is in appearance.