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Narsarsukite
Narsarsukite

Covellite
Covellite



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Narsarsukite
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Covellite

Narsarsukite and Covellite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Resinous
1.2 Pleochroism
Weak; O = colorless to yellow; E = colorless to honey-yellow
Marked
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
1.5 Refractive Index
1.610-1.6471.45-2.62
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
tetragonal
Hexagonal
1.8 Birefringence
0.021Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
OpaqueAnthony et al

Narsarsukite and Covellite Optic Character

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

Narsarsukite and Covellite Transparency

Similar to their colors, Narsarsukite 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, Narsarsukite is Translucent and Transparent while Narsarsukite is Translucent and Transparent in appearance.