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Cobaltite and Tanzanite Optical Properties


Tanzanite and Cobaltite Optical Properties


Optical Properties

Luster
Not Available   
Vitreous   

Pleochroism
Very weak   
Present   

Dispersion
Not Available   
0.03   
14

Transparency
Gems   
Transparent, Translucent, Transparent to translucent   

Refractive Index
Not Available   
1.685-1.707   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: P ca21   
Orthorhombic   

Birefringence
Not Available   
0.006-0.018   

Clarity
Gems   
TransparentUlrich Henn and Claudio C. Milisenda   

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Cobaltite and Tanzanite Optic Character

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

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Cobaltite and Tanzanite Transparency

Similar to their colors, Cobaltite and Tanzanite 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.

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