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Vivianite
Vivianite

Eosphorite
Eosphorite



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Vivianite
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Eosphorite

Vivianite and Eosphorite Optical Properties

Optical Properties

Luster

Vitreous, Pearly
Vitreous, Resinous

Pleochroism

Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue
Visible: X = yellow; Y = pink; Z = pale pink to colorless

Dispersion

0.030.01
0.005 1
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Transparency

Transparent
Transparent

Refractive Index

1.560-1.6401.639-1.672
1 3.25
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Optic Character

-
-

Crystal System

-
Orthorhombic

Birefringence

0.054-0.0750.029-0.032
0 0.296
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Clarity

Transparent
Transparent

Vivianite and Eosphorite Optic Character

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

Vivianite and Eosphorite Transparency

Similar to their colors, Vivianite and Eosphorite 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, Vivianite is Transparent while Vivianite is Transparent in appearance.