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Stibiotantalite
Stibiotantalite

Eudialyte
Eudialyte



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Stibiotantalite
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Eudialyte

Stibiotantalite and Eudialyte Optical Properties

Optical Properties

Luster

Adamantine
Vitreous

Pleochroism

-
Weak: O= colorless

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

-
Translucent

Refractive Index

2.37-2.451.591-1.633
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

0.080.003-0.010
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
Translucent

Stibiotantalite and Eudialyte Optic Character

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

Stibiotantalite and Eudialyte Transparency

Similar to their colors, Stibiotantalite and Eudialyte 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, Stibiotantalite is while Stibiotantalite is in appearance.