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Mimetite and Foitite Optical Properties


Foitite and Mimetite Optical Properties


Optical Properties

Luster
Resinous, Subadamantine   
Vitreous   

Pleochroism
Weak   
Strong: pale lavender dark blueAnthony et al   

Dispersion
Not Available   
Not Available   

Transparency
Translucent   
TranslucentAnthony et al, Translucent   

Refractive Index
2.106-2.263   
Not Available   

Optic Character
Not Available   
Not Available   

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

Birefringence
0.019   
Not Available   

Clarity
Translucent   
TranslucentAnthony et al   

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Mimetite and Foitite Optic Character

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

Similar to their colors, Mimetite 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, Mimetite is Translucent while Mimetite is Translucent in appearance.

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