1) Iron mineral 2) Magnetic mineral 
Spinel structural group | formula = Fe2+Fe3+2S4 | strunz = 02.DA.05 | dana = | symmetry = Isometric hexoctahedral H-M symbol: (4/m{overline|3}2/m) Space group: F d3m | unit cell = a = 9.876 Å; Z = 8 | molweight = | color = Pale pink, tarnishes to metallic blue-black | colour = | habit = Spheres of intergrown octahedra and as disseminated microsco...
A dark mineral with spinel-like structure, Fe3S4.