×

Foitite
Foitite

Taaffeite
Taaffeite



ADD
Compare
X
Foitite
X
Taaffeite

Foitite and Taaffeite Optical Properties

Add ⊕

Optical Properties

Luster

Vitreous
Vitreous

Pleochroism

Strong: pale lavender dark blueAnthony et al
Weak

Dispersion

0.020.02
0.005 1
👆🏻

Transparency

TranslucentAnthony et al, Translucent
-

Refractive Index

-99991.70-1.73
1 3.25
👆🏻

Optic Character

-
-

Crystal System

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

Birefringence

-99990.055
0 0.296
👆🏻

Clarity

TranslucentAnthony et al
-

Foitite and Taaffeite Optic Character

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

Similar to their colors, Foitite and Taaffeite 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.