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Eosphorite
Eosphorite

Vivianite
Vivianite



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Eosphorite
X
Vivianite

Eosphorite and Vivianite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Vitreous, Pearly

Pleochroism

Visible: X = yellow; Y = pink; Z = pale pink to colorless
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

Transparent
Transparent

Refractive Index

1.639-1.6721.560-1.640
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
-

Birefringence

0.029-0.0320.054-0.075
0 0.296
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Clarity

Transparent
Transparent

Eosphorite and Vivianite Optic Character

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

Eosphorite and Vivianite Transparency

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