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Andesine and Stibiotantalite Optical Properties


Stibiotantalite and Andesine Optical Properties


Optical Properties

Luster
Vitreous   
Adamantine   

Pleochroism
colorless.   
Not Available   

Dispersion
0.70   
2
Not Available   

Transparency
Transparent, Translucent, Transparent to translucent   
Gemmological Tables (2004) More from other references   

Refractive Index
1.543-1.564   
2.37-2.45   

Optic Character
Biaxial/+   
Not Available   

Crystal System
Triclinic   
Not Available   

Birefringence
0.007-0.011   
0.08   

Clarity
Transparent   
TransparentUlrich Henn and Claudio C. Milisenda   

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Andesine and Stibiotantalite Optic Character

Andesine and Stibiotantalite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Andesine and Stibiotantalite 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 Andesine and Stibiotantalite 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. Andesine has Biaxial/+ character.

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Andesine and Stibiotantalite Transparency

Similar to their colors, Andesine and Stibiotantalite 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, Andesine is Translucent, Transparent and Transparent to translucent while Andesine is Translucent, Transparent and Transparent to translucent in appearance.

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