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Smithsonite
Smithsonite

Tantalite
Tantalite



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Smithsonite
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Tantalite

Smithsonite and Tantalite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Resinous

Pleochroism

-
-

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

Translucent
TransparentWalter Schumann

Refractive Index

1.620-1.8502.190-2.457
1 3.25
👆🏻

Optic Character

-
-

Crystal System

Trigonal
Orthorhombic

Birefringence

0.223-0.2270.083
0 0.296
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Clarity

Translucent
TransparentWalter Schumann

Smithsonite and Tantalite Optic Character

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

Smithsonite and Tantalite Transparency

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