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Tantalite and Sinhalite Optical Properties


Sinhalite and Tantalite Optical Properties


Optical Properties

Luster
Resinous   
Not Available   

Pleochroism
Not Available   
Trichroism: green light brown dark brownHerve Nicolas Lazzarelli   

Dispersion
Not Available   
0.02   
21

Transparency
TransparentWalter Schumann, Gemstones of the world (2001) More from other references   
Gemmological Tables (2004) More from other references   

Refractive Index
2.190-2.457   
1.665-1.712   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
Orthorhombic   

Birefringence
0.083   
0.036-0.042   

Clarity
TransparentWalter Schumann   
TransparentUlrich Henn and Claudio C. Milisenda   

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Tantalite and Sinhalite Optic Character

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

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Tantalite and Sinhalite Transparency

Similar to their colors, Tantalite 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, 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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