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Smithsonite
Smithsonite

Vivianite
Vivianite



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Smithsonite
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Vivianite

Smithsonite and Vivianite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous, Pearly

Pleochroism

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

Dispersion

0.010.03
0.005 1
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Transparency

Translucent
Transparent

Refractive Index

1.620-1.8501.560-1.640
1 3.25
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Optic Character

-
-

Crystal System

Trigonal
-

Birefringence

0.223-0.2270.054-0.075
0 0.296
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Clarity

Translucent
Transparent

Smithsonite and Vivianite Optic Character

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

Smithsonite and Vivianite Transparency

Similar to their colors, Smithsonite 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, Smithsonite is Translucent while Smithsonite is Translucent in appearance.