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Covellite
Covellite

Ammolite
Ammolite



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Covellite
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Ammolite

Covellite and Ammolite Optical Properties

1 Optical Properties
1.1 Luster
Resinous
Silky, Vitreous
1.2 Pleochroism
Marked
None
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
Not Available
1.5 Refractive Index
1.45-2.621.520-1.670
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Trigonal
1.8 Birefringence
Not Available0.135-0.145
Achroite
0 0.296
1.9 Clarity
OpaqueAnthony et al
Not Available

Covellite and Ammolite Optic Character

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

Similar to their colors, Covellite and Ammolite 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.