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Sardonyx and Vivianite Optical Properties


Vivianite and Sardonyx Optical Properties


Optical Properties

Luster
Not Available   
Vitreous, Pearly   

Pleochroism
Not Available   
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
Transparent   

Refractive Index
1.530-1.543   
1.560-1.640   

Optic Character
Not Available   
Not Available   

Crystal System
Not Available   
Not Available   

Birefringence
0.008-0.010   
0.054-0.075   

Clarity
Translucent   
Transparent   

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Sardonyx and Vivianite Optic Character

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

Similar to their colors, Sardonyx and Vivianite 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, Sardonyx is Translucent while Sardonyx is Translucent in appearance.

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