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Smithsonite
Smithsonite

Manganotantalite
Manganotantalite



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Smithsonite and Manganotantalite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous, Pearly
Not Available
1.2 Pleochroism
AbsentWalter Schumann
Sometimes strongArthur Thomas
1.3 Dispersion
Albite Optical ..
0.01
Rank: 26 (Overall)
Not Available
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Translucent
TransparentWalter Schumann, Gemstones of the world (2001) More from other references
1.5 Refractive Index
1.620-1.850
2.19-2.34
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal
Not Available
1.8 Birefringence
0.223-0.227
0.015
1.9 Clarity
Translucent
TransparentWalter Schumann

Smithsonite and Manganotantalite Optic Character

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

Smithsonite and Manganotantalite Transparency

Similar to their colors, Smithsonite 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, Smithsonite is Translucent while Smithsonite is Translucent in appearance.