Iron ore is a mineral that is mined from the earth and is composed of iron oxides. It is an important source of iron for many industries. The five crossword solutions for the term iron ore are HEMATITE (8 letters), limonite (8 letters), haematite (9 letters), taconite (8 letters) and siderite (8 letters). HEMATITE is a mineral composed of iron oxide and is the most common type of iron ore. Limonite is a hydrated iron oxide and is a less common type of iron ore. Haematite is a mineral composed of iron oxide and is similar to HEMATITE. Taconite is a low-grade iron ore that is composed of magnetite and HEMATITE. Siderite is a mineral composed of iron carbonate and is the least common type of iron ore.