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Covellite

Omphacite
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Covellite and Omphacite Optical Properties

1 Optical Properties
1.1 Luster
Resinous
Vitreous
1.2 Pleochroism
Marked
Weak: colorless -- very pale green -- very pale green
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
TranslucentAnthony et al, Handbook of mineralogy (2001)
1.5 Refractive Index
1.45-2.62
1.662-1.723
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Not Available
1.8 Birefringence
Not Available
Not Available
1.9 Clarity
OpaqueAnthony et al
TranslucentAnthony et al

Covellite and Omphacite Optic Character

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

Similar to their colors, Covellite and Omphacite 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 Handbook of mineralogy (2001) More from other references and OpaqueAnthony et al while Covellite is Handbook of mineralogy (2001) More from other references and OpaqueAnthony et al in appearance.