| Answer | Crossword Clue |
|---|---|
| SIDERITE | Valuable ore of iron. |
| SIDERITE | Valuable ore of iron |
| SIDERITE | Valuable iron ore |
| siderite | a native ferrous carbonate FeCO3 that is a valuable iron ore |
| siderites | a native ferrous carbonate FeCO3 that is a valuable iron ore |
| BORNITE | Valuable ore of copper. |
| LODE | Deposit of valuable ore |
| washes | subject (as crushed ore) to the action of water to separate valuable material |
