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Vesuvianite
Vesuvianite

Foitite
Foitite



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Vesuvianite
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Foitite

Vesuvianite and Foitite Optical Properties

Optical Properties

Luster

Vitreous, Resinous
Vitreous

Pleochroism

slight in colored varieties
Strong: pale lavender dark blueAnthony et al

Dispersion

0.030.02
0.005 1
👆🏻

Transparency

-
TranslucentAnthony et al, Translucent

Refractive Index

1.703-1.752-9999
1 3.25
👆🏻

Optic Character

-
-

Crystal System

tetragonal
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m

Birefringence

0.004-0.006-9999
0 0.296
👆🏻

Clarity

-
TranslucentAnthony et al

Vesuvianite and Foitite Optic Character

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

Similar to their colors, Vesuvianite and Foitite 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.