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Tantalite and Cobaltite Optical Properties


Cobaltite and Tantalite Optical Properties


Optical Properties

Luster
Resinous   
Not Available   

Pleochroism
Not Available   
Very weak   

Dispersion
Not Available   
Not Available   

Transparency
TransparentWalter Schumann, Gemstones of the world (2001) More from other references   
Gems   

Refractive Index
2.190-2.457   
Not Available   

Optic Character
Not Available   
Not Available   

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

Birefringence
0.083   
Not Available   

Clarity
TransparentWalter Schumann   
Gems   

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Tantalite and Cobaltite Optic Character

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

Similar to their colors, Tantalite and Cobaltite 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, Tantalite is Gemstones of the world (2001) More from other references and TransparentWalter Schumann while Tantalite is Gemstones of the world (2001) More from other references and TransparentWalter Schumann in appearance.

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