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Gahnospinel and Thulite Optical Properties


Thulite and Gahnospinel Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
AbsentWalter Schumann   
Present   

Dispersion
Not Available   
Not Available   

Transparency
Gemmological Tables (2004)   
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.   

Refractive Index
1.735-1.790   
1.695   

Optic Character
Not Available   
Not Available   

Crystal System
Isometric   
Orthorhombic   

Birefringence
Not Available   
0.006-0.018   

Clarity
TransparentUlrich Henn and Claudio C. Milisenda   
OpaqueHerve Nicolas Lazzarelli   

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Gahnospinel and Thulite Optic Character

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

Similar to their colors, Gahnospinel and Thulite 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, Gahnospinel is Gemmological Tables (2004) while Gahnospinel is Gemmological Tables (2004) in appearance.

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