:siderite is also the name of a type of iron meteorite.  siderite is a mineral composed of iron(ii) carbonate (feco3). it takes its name from the greek word ÏÎ¯Î´Î·ÏÎ¿Ï sideros, âironâ. it is a valuable iron mineral, since it is 48% iron and contains no sulfur or phosphorus. zinc, magnesium and manganese commonly substitute for the iron resulting in the siderite-smithsonite, siderite-magnesite and siderite-rhodochrosite solid solution series. siderite has mohs hardness of 3.75-4.25, a specific gravity of 3.96, a white streak and a vitreous lustre or pearly luster. it crystallizes in the trigonal crystal system, and are rhombohedral in shape, typically with curved and striated faces. it also occurs in masses. color ranges from yellow to dark brown or black, the latter being due to the presence of manganese. siderite is commonly found in hydrothermal veins, and is associated with barite, fluorite, galena, and others. it is also a common diagenetic mineral in shales and sandstones, where it sometimes forms concretions. in sedimentary rocks, siderite commonly forms at shallow burial depths and its elemental composition is often related to the depositional environment of the enclosing sediments.*mozley, p.s., 1989, relation be
Calcite_group Carbonate_minerals Carbonates Iron_minerals Trigonal_minerals