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Covellite
Covellite

Moissanite
Moissanite



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Moissanite

Covellite and Moissanite Optical Properties

1 Optical Properties
1.1 Luster
Resinous
Adamantine
1.2 Pleochroism
Marked
NilArthur Thomas
1.3 Dispersion
NA0.10
Fluorite Optical Properties
0.007 1
1.4 Transparency
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.45-2.622.648-2.691
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
6H polytype
1.8 Birefringence
Not Available0.043
Achroite
0 0.296
1.9 Clarity
OpaqueAnthony et al
TransparentUlrich Henn and Claudio C. Milisenda

Covellite and Moissanite Optic Character

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

Similar to their colors, Covellite and Moissanite 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.