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Stibiotantalite
Stibiotantalite

Hematite
Hematite



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Stibiotantalite
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Hematite

Stibiotantalite and Hematite Optical Properties

Optical Properties

Luster

Adamantine
-

Pleochroism

-
O = brownish red; E = yellowish red

Dispersion

0.030.05
0.005 1
👆🏻

Transparency

-
OpaqueHerve Nicolas Lazzarelli

Refractive Index

2.37-2.452.690-3.220
1 3.25
👆🏻

Optic Character

-
-

Crystal System

-
Trigonal

Birefringence

0.080.280
0 0.296
👆🏻

Clarity

TransparentUlrich Henn and Claudio C. Milisenda
OpaqueHerve Nicolas Lazzarelli

Stibiotantalite and Hematite Optic Character

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

Similar to their colors, Stibiotantalite and Hematite 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.