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Apatite and Manganotantalite Optical Properties


Manganotantalite and Apatite Optical Properties


Optical Properties

Luster
Vitreous   
Not Available   

Pleochroism
Blue stones – strong   
Sometimes strongArthur Thomas   

Dispersion
0.01   
27
Not Available   

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

Refractive Index
1.628-1.651   
2.19-2.34   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Not Available   

Birefringence
0.002-0.008   
0.015   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
TransparentWalter Schumann   

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Apatite and Manganotantalite Optic Character

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

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

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