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Tantalite and Lazulite Optical Properties


Lazulite and Tantalite Optical Properties


Optical Properties

Luster
Resinous   
Not Available   

Pleochroism
Not Available   
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli   

Dispersion
Not Available   
0.01   
26

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

Refractive Index
2.190-2.457   
1.604-1.646   

Optic Character
Not Available   
Not Available   

Crystal System
Orthorhombic   
monoclinic   

Birefringence
0.083   
0.031-0.036   

Clarity
TransparentWalter Schumann   
Transparent   

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Tantalite and Lazulite Optic Character

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

Similar to their colors, Tantalite and Lazulite 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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Brown Gemstones


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