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Ammolite and Foitite Optical Properties


Foitite and Ammolite Optical Properties


Optical Properties

Luster
Silky, Vitreous   
Vitreous   

Pleochroism
None   
Strong: pale lavender dark blueAnthony et al   

Dispersion
Not Available   
Not Available   

Transparency
Not Available   
TranslucentAnthony et al, Translucent   

Refractive Index
1.520-1.670   
Not Available   

Optic Character
Not Available   
Not Available   

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

Birefringence
0.135-0.145   
Not Available   

Clarity
Not Available   
TranslucentAnthony et al   

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Ammolite and Foitite Optic Character

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

Similar to their colors, Ammolite 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, Ammolite is Not Available while Ammolite is Not Available in appearance.

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