Foitite and Lapis lazuli Optical Properties

Foitite

Lapis lazuli

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous

Vitreous, Greasy

1.2 Pleochroism

Strong: pale lavender dark blueAnthony et al

AbsentWalter Schumann

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

TranslucentAnthony et al, Translucent

Opaque

1.5 Refractive Index

Not Available1.500-1.670

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

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

Trigonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TranslucentAnthony et al

Gemstones of the world (2001)

Foitite and Lapis lazuli Optic Character

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

Compare Violet Gemstones

Foitite Vs Hureaulite

Foitite Vs Hydrogrossular

Foitite Vs Labradorite

Foitite and Lapis lazuli Transparency

Similar to their colors, Foitite and Lapis lazuli 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.