Siderite

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 σίδηρος sideros, “iron”. 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.