Papagoite and Foitite Optical Properties

Papagoite

Foitite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Trichroic

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

1.607-1.672Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

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

1.8 Birefringence

0.065Not Available

0 0.296

1.9 Clarity

Transparent

TranslucentAnthony et al

Papagoite and Foitite Optic Character

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

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