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Eudialyte
Eudialyte

Foitite
Foitite



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Eudialyte
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Eudialyte and Foitite Optical Properties

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Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Weak: O= colorless
Strong: pale lavender dark blueAnthony et al

Dispersion

0.010.02
0.005 1
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Transparency

Translucent
TranslucentAnthony et al, Translucent

Refractive Index

1.591-1.633-9999
1 3.25
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Optic Character

-
-

Crystal System

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

Birefringence

0.003-0.010-9999
0 0.296
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Clarity

Translucent
TranslucentAnthony et al

Eudialyte and Foitite Optic Character

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

Eudialyte and Foitite Transparency

Similar to their colors, Eudialyte 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, Eudialyte is Translucent while Eudialyte is Translucent in appearance.