Marialite and Foitite Optical Properties

Marialite

Foitite

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1 Optical Properties

1.1 Luster

Vitreous, Pearly, Resinous

Vitreous

1.2 Pleochroism

Not Available

Strong: pale lavender dark blueAnthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

TranslucentAnthony et al, Translucent

1.5 Refractive Index

1.540-1.550Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

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

1.8 Birefringence

0.004-0.008Not Available

0 0.296

1.9 Clarity

Transparent

TranslucentAnthony et al

Marialite and Foitite Optic Character

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

Similar to their colors, Marialite 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, Marialite is Translucent and Transparent while Marialite is Translucent and Transparent in appearance.