Cuprite and Foitite Optical Properties

Cuprite

Foitite

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1 Optical Properties

1.1 Luster

Adamantine

Vitreous

1.2 Pleochroism

visible

Strong: pale lavender dark blueAnthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

TranslucentWalter Schumann

TranslucentAnthony et al, Translucent

1.5 Refractive Index

2.849Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

cubic

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

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TranslucentWalter Schumann

TranslucentAnthony et al

Cuprite and Foitite Optic Character

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

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Cuprite and Foitite Transparency

Similar to their colors, Cuprite 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, Cuprite is TranslucentWalter Schumann while Cuprite is TranslucentWalter Schumann in appearance.