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Sapphire and Manganotantalite Optical Properties


Manganotantalite and Sapphire Optical Properties


Optical Properties

Luster
Vitreous, Adamantine, Vitreous, Adamantine   
Not Available   

Pleochroism
Strong   
Sometimes strongArthur Thomas   

Dispersion
0.02   
21
Not Available   

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

Refractive Index
1.762-1.788   
2.19-2.34   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.008-0.009   
0.015   

Clarity
Transparent   
TransparentWalter Schumann   

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Sapphire and Manganotantalite Optic Character

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

Similar to their colors, Sapphire 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, Sapphire is Translucent, Transparent and Transparent to opaque while Sapphire is Translucent, Transparent and Transparent to opaque in appearance.

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