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Tantalite and Vivianite Optical Properties


Vivianite and Tantalite Optical Properties


Optical Properties

Luster
Resinous   
Vitreous, Pearly   

Pleochroism
Not Available   
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue   

Dispersion
Not Available   
Not Available   

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

Refractive Index
2.190-2.457   
1.560-1.640   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Not Available   

Birefringence
0.083   
0.054-0.075   

Clarity
TransparentWalter Schumann   
Transparent   

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Tantalite and Vivianite Optic Character

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

Similar to their colors, Tantalite and Vivianite 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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