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These mineral photos are copyrighted by their owners and may not be used without permission.
Fersilicite: FeSi Xifengite: Fe5Si3
Comments: Reflected light image of cream white grain of xifengite (Xi) with exsolution of white gupeiite (Gu) and grey fersilicite (Fe). Epoxy grain mount.
Location: Isovskaya Field, Priasovje, Ukraine.
Scale: Picture Size 0.7 mm.
© Thomas Witzke
Fersilicite: FeSi Ferdisilicite: FeSi2
Comments: Dark grains of ferdisilicite, in sand, intermixed with dark grains of fersilicate.
Location: Poltava series, Zachativsk station, Donets (Donetsk) region, Donets'k Oblast' (Donetsk Oblast'), Ukraine.
Scale: 0.2 cm field of view.
© Jeff Weissman / Photographic Guide to Mineral Species