×

Foitite
Foitite

Vivianite
Vivianite



ADD
Compare
X
Foitite
X
Vivianite

Foitite and Vivianite Optical Properties

Add ⊕
1 Optical Properties
1.1 Luster
Vitreous
Vitreous, Pearly
1.2 Pleochroism
Strong: pale lavender dark blueAnthony et al
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
TranslucentAnthony et al, Translucent
Transparent
1.5 Refractive Index
Not Available1.560-1.640
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Not Available
1.8 Birefringence
Not Available0.054-0.075
Achroite
0 0.296
1.9 Clarity
TranslucentAnthony et al
Transparent

Foitite and Vivianite Optic Character

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

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