Foitite and Azurmalachite Optical Properties

Foitite

Azurmalachite

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1 Optical Properties

1.1 Luster

Vitreous

Vitreous, Silky

1.2 Pleochroism

Strong: pale lavender dark blueAnthony et al

AbsentWalter Schumann

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TranslucentAnthony et al, Translucent

Translucent

1.5 Refractive Index

Not Available1.655-1.909

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

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

monoclinic

1.8 Birefringence

Not Available0.108-0.254

0 0.296

1.9 Clarity

TranslucentAnthony et al

Translucent

Foitite and Azurmalachite Optic Character

Foitite and Azurmalachite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Foitite and Azurmalachite 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 Azurmalachite 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. Azurmalachite has Biaxial/+ character.

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Foitite and Azurmalachite Transparency

Similar to their colors, Foitite and Azurmalachite 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.