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Corundum and Vivianite Optical Properties


Vivianite and Corundum Optical Properties


Optical Properties

Luster
Adamantine, Vitreous   
Vitreous, Pearly   

Pleochroism
None   
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue   

Dispersion
0.02   
21
Not Available   

Transparency
Transparent, Translucent   
Transparent   

Refractive Index
1.758-1.780   
1.560-1.640   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Not Available   

Birefringence
0.007-0.010   
0.054-0.075   

Clarity
Gemmological Tables (2004) More from other references   
Transparent   

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Corundum and Vivianite Optic Character

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

Similar to their colors, Corundum 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, Corundum is Translucent and Transparent while Corundum is Translucent and Transparent in appearance.

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