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Foitite
Foitite

Mimetite
Mimetite



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Foitite
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Mimetite

Foitite and Mimetite Optical Properties

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1 Optical Properties
1.1 Luster
Vitreous
Resinous, Subadamantine
1.2 Pleochroism
Strong: pale lavender dark blueAnthony et al
Weak
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
TranslucentAnthony et al, Translucent
Translucent
1.5 Refractive Index
Not Available2.106-2.263
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Hexagonal
1.8 Birefringence
Not Available0.019
Achroite
0 0.296
1.9 Clarity
TranslucentAnthony et al
Translucent

Foitite and Mimetite Optic Character

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

Foitite and Mimetite Transparency

Similar to their colors, Foitite and Mimetite 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, Foitite is Translucent and TranslucentAnthony et al while Foitite is Translucent and TranslucentAnthony et al in appearance.