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Atacamite
Atacamite

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Atacamite
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Covellite

Atacamite and Covellite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine, Vitreous
Resinous
1.2 Pleochroism
X = pale green; Y = yellow-green; Z = grass-green
Marked
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Not Available
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
1.5 Refractive Index
1.831
1.45-2.62
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Hexagonal
1.8 Birefringence
0.049
Not Available
1.9 Clarity
Not Available
OpaqueAnthony et al

Atacamite and Covellite Optic Character

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

Atacamite and Covellite Transparency

Similar to their colors, Atacamite 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, Atacamite is Not Available while Atacamite is Not Available in appearance.