Hureaulite and Foitite Optical Properties

Hureaulite

Foitite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous, Greasy

Vitreous

1.2 Pleochroism

Colorless yellow to pale rose reddish yellow to reddish brown.Anthony et al

Strong: pale lavender dark blueAnthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent

TranslucentAnthony et al, Translucent

1.5 Refractive Index

1.647-1.667Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c

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

1.8 Birefringence

0.012Not Available

0 0.296

1.9 Clarity

Transparent

TranslucentAnthony et al

Hureaulite and Foitite Optic Character

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

Compare Violet Gemstones

Hureaulite Vs Lepidolite

Hureaulite Vs Meionite

Hureaulite Vs Marialite

Hureaulite and Foitite Transparency

Similar to their colors, Hureaulite 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, Hureaulite is Transparent while Hureaulite is Transparent in appearance.