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Foitite
Foitite

Vesuvianite
Vesuvianite



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Foitite
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Vesuvianite

Foitite and Vesuvianite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous, Resinous

Pleochroism

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

Dispersion

0.020.03
0.005 1
👆🏻

Transparency

TranslucentAnthony et al, Translucent
-

Refractive Index

-99991.703-1.752
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

-99990.004-0.006
0 0.296
👆🏻

Clarity

TranslucentAnthony et al
-

Foitite and Vesuvianite Optic Character

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

Foitite and Vesuvianite Transparency

Similar to their colors, Foitite and Vesuvianite 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, Foitite is TranslucentAnthony et al and Translucent while Foitite is TranslucentAnthony et al and Translucent in appearance.