Limonite is an easy to find source of iron, although it requires more work to turn it into something useable,

  1. First it needs to be smelted
  2. Once smelted, it is a raw iron chunk (same as iron ore drops) which can either be smelted again into a nugget or ground into a tiny pile of iron dust
  3. Finally the nuggets need to be combined into an iron bar (or the tiny dusts into a large pile, which is smelted)

The image at the right shows this process. Grinding will be the most efficient method, as it will yield twice as much dust (with a little extra if the sifter is used).