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Cobaltite
Cobaltite

Sinhalite
Sinhalite



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Cobaltite
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Sinhalite

Cobaltite and Sinhalite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Not Available
1.2 Pleochroism
Very weak
Trichroism: green light brown dark brownHerve Nicolas Lazzarelli
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gems
Gemmological Tables (2004) More from other references
1.5 Refractive Index
Not Available1.665-1.712
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: P ca21
Orthorhombic
1.8 Birefringence
Not Available0.036-0.042
Achroite
0 0.296
1.9 Clarity
Gems
TransparentUlrich Henn and Claudio C. Milisenda

Cobaltite and Sinhalite Optic Character

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

Cobaltite and Sinhalite Transparency

Similar to their colors, Cobaltite and Sinhalite 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, Cobaltite is Gems while Cobaltite is Gems in appearance.