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Boracite
Boracite

Vivianite
Vivianite



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Boracite
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Vivianite

Boracite and Vivianite Optical Properties

Optical Properties

Luster

Vitreous, Adamantine
Vitreous, Pearly

Pleochroism

None
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue

Dispersion

-0.03
0.005 1
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Transparency

Transparent
Transparent

Refractive Index

1.658-1.6731.560-1.640
1 3.25
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Optic Character

-
-

Crystal System

Orthorhombic
-

Birefringence

0.010-0.0110.054-0.075
0 0.296
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Clarity

Transparent
Transparent

Boracite and Vivianite Optic Character

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

Boracite and Vivianite Transparency

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