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Emerald and Foitite Optical Properties


Foitite and Emerald Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous   

Pleochroism
Strong dichroism: yellow green Lazzarelli   
Strong: pale lavender dark blueAnthony et al   

Dispersion
0.01   
26
Not Available   

Transparency
Transparent, Translucent, Transparent to translucent   
TranslucentAnthony et al, Translucent   

Refractive Index
1.565-1.602   
Not Available   

Optic Character
Not Available   
Not Available   

Crystal System
Hexagonal   
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m   

Birefringence
0.0040-0.0070   
Not Available   

Clarity
Color grading system   
TranslucentAnthony et al   

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Emerald and Foitite Optic Character

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

Similar to their colors, Emerald and Foitite 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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