Pezzottaite and Foitite Optical Properties

Pezzottaite

Foitite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Moderate dichroic

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

1.598-1.620Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

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

1.8 Birefringence

0.008-0.011Not Available

0 0.296

1.9 Clarity

Transparent

TranslucentAnthony et al

Pezzottaite and Foitite Optic Character

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

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