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Mimetite and Tantalite Optical Properties


Tantalite and Mimetite Optical Properties


Optical Properties

Luster
Resinous, Subadamantine   
Resinous   

Pleochroism
Weak   
Not Available   

Dispersion
Not Available   
Not Available   

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

Refractive Index
2.106-2.263   
2.190-2.457   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Orthorhombic   

Birefringence
0.019   
0.083   

Clarity
Translucent   
TransparentWalter Schumann   

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Mimetite and Tantalite Optic Character

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

Similar to their colors, Mimetite and Tantalite 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, Mimetite is Translucent while Mimetite is Translucent in appearance.

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