Stibiotantalite and Zincite Optical Properties

Stibiotantalite

Zincite

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1 Optical Properties

1.1 Luster

Adamantine

Subadamantine, Resinous

1.2 Pleochroism

Not Available

Very weak

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

TransparentRobert C. Kammerling, The Journal of Gemmology (1995) More from other references

1.5 Refractive Index

2.37-2.452.013-2.029

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Hexagonal

1.8 Birefringence

0.080.016

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

TransparentRobert C. Kammerling

Stibiotantalite and Zincite Optic Character

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

Similar to their colors, Stibiotantalite and Zincite 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 Gemmological Tables (2004) More from other references while Stibiotantalite is Gemmological Tables (2004) More from other references in appearance.