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Covellite
Covellite

Taaffeite
Taaffeite



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Covellite
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Taaffeite

Covellite and Taaffeite Optical Properties

Optical Properties

Luster

Resinous
Vitreous

Pleochroism

Marked
Weak

Dispersion

0.080.02
0.005 1
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Transparency

OpaqueAnthony et al
-

Refractive Index

1.45-2.621.70-1.73
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
Hexagonal

Birefringence

-99990.055
0 0.296
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Clarity

OpaqueAnthony et al
-

Covellite and Taaffeite Optic Character

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

Covellite and Taaffeite Transparency

Similar to their colors, Covellite and Taaffeite 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, Covellite is OpaqueAnthony et al while Covellite is OpaqueAnthony et al in appearance.