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Aragonite
Aragonite

Foitite
Foitite



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Aragonite
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Foitite

Aragonite and Foitite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous, Resinous
Vitreous
1.2 Pleochroism
StrongArthur Thomas
Strong: pale lavender dark blueAnthony et al
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Transparent, Translucent
TranslucentAnthony et al, Translucent
1.5 Refractive Index
1.525-1.686Not Available
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
1.8 Birefringence
0.155Not Available
Achroite
0 0.296
1.9 Clarity
Transparent
TranslucentAnthony et al

Aragonite and Foitite Optic Character

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

Aragonite and Foitite Transparency

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