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Vanadinite
Vanadinite

Mellite
Mellite



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Vanadinite
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Mellite

Vanadinite and Mellite Optical Properties

Optical Properties

Luster

Resinous
Vitreous

Pleochroism

-
Weak: yellowish brown yellowAnthony et al

Dispersion

0.150.01
0.005 1
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Transparency

-
-

Refractive Index

2.4161.509-1.541
1 3.25
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Optic Character

-
-

Crystal System

Hexagonal
-

Birefringence

0.0660.030
0 0.296
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Clarity

-
TransparentUlrich Henn and Claudio C. Milisenda

Vanadinite and Mellite Optic Character

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

Similar to their colors, Vanadinite and Mellite 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.