Tantalite and Bowenite Optical Properties

Tantalite

Bowenite

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Optical Properties

Luster

Resinous

Waxy, Silky, Resinous, Greasy

Pleochroism

Dispersion

0.030.01

0.005 1

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Transparency

TransparentWalter Schumann

TranslucentHerve Nicolas Lazzarelli

Refractive Index

2.190-2.4571.530-1.575

1 3.25

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Optic Character

Crystal System

Orthorhombic

Birefringence

0.083-9999

0 0.296

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Clarity

TransparentWalter Schumann

TranslucentHerve Nicolas Lazzarelli

Tantalite and Bowenite Optic Character

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

Similar to their colors, Tantalite and Bowenite 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, Tantalite is TransparentWalter Schumann while Tantalite is TransparentWalter Schumann in appearance.