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Cobaltite
Cobaltite

Mottramite
Mottramite



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Cobaltite
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Mottramite

Cobaltite and Mottramite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Greasy
1.2 Pleochroism
Very weak
Visible X=Y= canary yellow to greenish yellow
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gems
Not Available
1.5 Refractive Index
Not Available2.170
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 Available0.150
Achroite
0 0.296
1.9 Clarity
Gems
Not Available

Cobaltite and Mottramite Optic Character

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

Similar to their colors, Cobaltite and Mottramite 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.