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Moissanite
Moissanite

Covellite
Covellite



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Moissanite
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Covellite

Moissanite and Covellite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine
Resinous
1.2 Pleochroism
NilArthur Thomas
Marked
1.3 Dispersion
0.10NA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
1.5 Refractive Index
2.648-2.6911.45-2.62
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
6H polytype
Hexagonal
1.8 Birefringence
0.043Not Available
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
OpaqueAnthony et al

Moissanite and Covellite Optic Character

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

Moissanite and Covellite Transparency

Similar to their colors, Moissanite 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, Moissanite is Gemmological Tables (2004) More from other references while Moissanite is Gemmological Tables (2004) More from other references in appearance.