| Answer | Crossword Clue |
|---|---|
| SPINEL | Mineral containing magnesium |
| montmorillonite | an alumina-rich clay mineral containing some sodium and magnesium |
| ferromagnesian | (of a rock or mineral) Containing iron and magnesium as major components |
| montmorillonite | An aluminum-rich clay mineral of the smectite group, containing some sodium and magnesium |
| seltzer | naturally effervescent mineral water containing common salt and small quantities of sodium, calcium, and magnesium carbonates |
| seltzers | naturally effervescent mineral water containing common salt and small quantities of sodium, calcium, and magnesium carbonates |
