×

Foitite
Foitite

Poudretteite
Poudretteite



ADD
Compare
X
Foitite
X
Poudretteite

Foitite and Poudretteite Optical Properties

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Strong: pale lavender dark blueAnthony et al
Colorless

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

TranslucentAnthony et al, Translucent
-

Refractive Index

-99991.511-1.532
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

-99990.021
0 0.296
👆🏻

Clarity

TranslucentAnthony et al
TransparentUlrich Henn and Claudio C. Milisenda

Foitite and Poudretteite Optic Character

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

Similar to their colors, Foitite and Poudretteite 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.