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Covellite
Covellite

Ettringite
Ettringite



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Covellite
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Ettringite

Covellite and Ettringite Optical Properties

1 Optical Properties
1.1 Luster
Resinous
Vitreous
1.2 Pleochroism
Marked
Not Available
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
Transparent, Translucent
1.5 Refractive Index
1.45-2.621.470-1.491
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Trigonal
1.8 Birefringence
Not Available0.021
Achroite
0 0.296
1.9 Clarity
OpaqueAnthony et al
Transparent

Covellite and Ettringite Optic Character

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

Similar to their colors, Covellite and Ettringite 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.