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Augite and Vivianite Optical Properties


Vivianite and Augite Optical Properties


Optical Properties

Luster
Vitreous, Resinous   
Vitreous, Pearly   

Pleochroism
Pale green   
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue   

Dispersion
Not Available   
Not Available   

Transparency
Transparent, Translucent   
Transparent   

Refractive Index
1.671-1.774   
1.560-1.640   

Optic Character
Not Available   
Not Available   

Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c   
Not Available   

Birefringence
Not Available   
0.054-0.075   

Clarity
Transparent   
Transparent   

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Augite and Vivianite Optic Character

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

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

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