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Anthophyllite
Anthophyllite

Tantalite
Tantalite



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Anthophyllite
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Tantalite

Anthophyllite and Tantalite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Resinous

Pleochroism

-
-

Dispersion

0.010.03
0.005 1
👆🏻

Transparency

Transparent
TransparentWalter Schumann

Refractive Index

1.603-1.6902.190-2.457
1 3.25
👆🏻

Optic Character

Biaxial/+
-

Crystal System

Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Orthorhombic

Birefringence

-99990.083
0 0.296
👆🏻

Clarity

Transparent
TransparentWalter Schumann

Anthophyllite and Tantalite Optic Character

Anthophyllite and Tantalite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Anthophyllite 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 Anthophyllite 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. Anthophyllite has Biaxial/+ character.

Anthophyllite and Tantalite Transparency

Similar to their colors, Anthophyllite 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, Anthophyllite is Transparent while Anthophyllite is Transparent in appearance.