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Apache Tear
Apache Tear

Vivianite
Vivianite



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Apache Tear
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Vivianite

Apache Tear and Vivianite Optical Properties

Optical Properties

Luster

-
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

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Transparent

Refractive Index

-99991.560-1.640
1 3.25
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Optic Character

-
-

Crystal System

-
-

Birefringence

-99990.054-0.075
0 0.296
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Clarity

-
Transparent

Apache Tear and Vivianite Optic Character

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

Apache Tear and Vivianite Transparency

Similar to their colors, Apache Tear 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, Apache Tear is while Apache Tear is in appearance.