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Phenakite and Tantalite Optical Properties


Tantalite and Phenakite Optical Properties


Optical Properties

Luster
Vitreous   
Resinous   

Pleochroism
Distinct: colorless orangy-yellowHerve Nicolas Lazzarelli   
Not Available   

Dispersion
0.02   
24
Not Available   

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

Refractive Index
1.650-1.695   
2.190-2.457   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Orthorhombic   

Birefringence
0.016   
0.083   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
TransparentWalter Schumann   

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Phenakite and Tantalite Optic Character

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

Similar to their colors, Phenakite 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, Phenakite is Gemmological Tables (2004) More from other references while Phenakite is Gemmological Tables (2004) More from other references in appearance.

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