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Amazonite
Amazonite

Covellite
Covellite



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Amazonite
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Covellite

Amazonite and Covellite Optical Properties

Optical Properties

Luster

Vitreous
Resinous

Pleochroism

-
Marked

Dispersion

0.010.08
0.005 1
👆🏻

Transparency

Translucent, Translucent to opaque
OpaqueAnthony et al

Refractive Index

1.522-1.5301.45-2.62
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Triclinic
Hexagonal

Birefringence

0.008-0.010-9999
0 0.296
👆🏻

Clarity

Translucent
OpaqueAnthony et al

Amazonite and Covellite Optic Character

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

Amazonite and Covellite Transparency

Similar to their colors, Amazonite and Covellite 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, Amazonite is Translucent and Translucent to opaque while Amazonite is Translucent and Translucent to opaque in appearance.