| Answer | Crossword Clue |
|---|---|
| HEMATITE | Main ore of iron |
| SIDERITE | Ore of iron |
| SIDERITE | Valuable ore of iron |
| SIDERITE | Valuable ore of iron. |
| BLASTFURNACEGAS | Byproduct of iron ore |
| ELBA | Island source of Italy's iron ore. |
| MINNESOTA | Where nearly 70% of our iron ore comes from. |
| MINN | State producing 70 per cent of U. S. iron ore: Abbr. |
