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Vanadinite
Vanadinite

Purpurite
Purpurite



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Vanadinite
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Purpurite

Vanadinite and Purpurite Optical Properties

Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Resinous
-
0.15
-
2.416
-
Hexagonal
0.066
-
 
-
StrongArthur Thomas
0.01
TranslucentWalter Schumann
1.85-1.92
-
Orthorhombic
0.070
TranslucentWalter Schumann

Vanadinite and Purpurite Optic Character

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

Vanadinite and Purpurite Transparency

Similar to their colors, Vanadinite and Purpurite 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, Vanadinite is while Vanadinite is in appearance.