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Stibiotantalite
Stibiotantalite

Andalusite
Andalusite



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Stibiotantalite
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Andalusite

Stibiotantalite and Andalusite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine
Vitreous, Greasy
1.2 Pleochroism
Not Available
strongly trichroic
1.3 Dispersion
NA0.02
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent
1.5 Refractive Index
2.37-2.451.627-1.650
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Not Available
Orthorhombic
1.8 Birefringence
0.080.009-0.010
Achroite
0 0.296
1.9 Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent

Stibiotantalite and Andalusite Optic Character

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

Similar to their colors, Stibiotantalite and Andalusite 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.