×

Taaffeite
Taaffeite

Covellite
Covellite



ADD
Compare
X
Taaffeite
X
Covellite

Taaffeite and Covellite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Resinous
1.2 Pleochroism
Weak
Marked
1.3 Dispersion
0.02NA
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
1.70-1.731.45-2.62
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Hexagonal
Hexagonal
1.8 Birefringence
0.055Not Available
Achroite
0 0.296
1.9 Clarity
Color grading system
OpaqueAnthony et al

Taaffeite and Covellite Optic Character

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

Taaffeite and Covellite Transparency

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