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Vesuvianite
Vesuvianite

Bertrandite
Bertrandite



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Vesuvianite
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Bertrandite

Vesuvianite and Bertrandite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

slight in colored varieties
none.

Dispersion

0.030.01
0.005 1
👆🏻

Transparency

-
TransparentAnthony et al

Refractive Index

1.703-1.7521.583-1.614
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21

Birefringence

0.004-0.006-9999
0 0.296
👆🏻

Clarity

-
TransparentAnthony et al

Vesuvianite and Bertrandite Optic Character

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

Vesuvianite and Bertrandite Transparency

Similar to their colors, Vesuvianite and Bertrandite 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, Vesuvianite is while Vesuvianite is in appearance.