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Emerald and Gahnospinel Optical Properties


Gahnospinel and Emerald Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Strong dichroism: yellow green Lazzarelli   
AbsentWalter Schumann   

Dispersion
0.01   
26
Not Available   

Transparency
Transparent, Translucent, Transparent to translucent   
Gemmological Tables (2004)   

Refractive Index
1.565-1.602   
1.735-1.790   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Isometric   

Birefringence
0.0040-0.0070   
Not Available   

Clarity
Color grading system   
TransparentUlrich Henn and Claudio C. Milisenda   

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Emerald and Gahnospinel Optic Character

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

Similar to their colors, Emerald and Gahnospinel 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, Emerald is Translucent, Transparent and Transparent to translucent while Emerald is Translucent, Transparent and Transparent to translucent in appearance.

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