Labradorite and Vivianite Optical Properties

Labradorite

Vivianite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly

1.2 Pleochroism

From the Congo

Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael OâDonoghue

1.3 Dispersion

0.01NA

0.007 1

1.4 Transparency

Transparent, Translucent, Transparent to translucent

Transparent

1.5 Refractive Index

1.554-1.5731.560-1.640

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Triclinic

Not Available

1.8 Birefringence

0.008-0.0100.054-0.075

0 0.296

1.9 Clarity

Transparent

Labradorite and Vivianite Optic Character

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

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