| AZURITE | Which blue mineral is an ore of copper (7) |
| ORPIMENT | Yellow mineral that is an ore of arsenic |
| CHALCOCITE | Sulphide which is an important ore of copper |
| OPAL | Which mineral is an amorphous form of hydrated silica, not as hard as quartz and, in its white or co |
| REALGAR | Soft orange-red crystalline mineral, an ore of arsenic |
| STILTON | Which blue cheese is Britain's bestknown? (7) |
| AZUAITE | Blue mineral, a source of copper (7) |
| SIMPSON | See 5dn, Which blue-haired woman posed naked on the cover of Playboy, November, 2009, issue? (5,7) |
| BAUXITE | What claylike mineral is the chief ore of aluminium? (7) |
| MINERAL | From a word for an excavation of earth, a term for an ore, such as coal, gold or silver, obtained by digging; a substance neither animal nor vegetable; water found in nature; or, any element essential |
| GANGUES | Team finds new use for valueless rocks in an ore (7) |
| BEDSORE | County mineral is a painful matter (7) |
| ASSAYED | Tested, as an ore sample |
| PYRITES | Yellow mineral is the object in combustible heaps |
| INSTORE | This month, mineral is available for purchase (2,5) |
| DYSODIL | Mineral is oddly crushed |
| REDARSENIC | Descriptive name for realgar, an ore of a toxic element |
| STANNITE | An ore of tin |
| SONIC | Which blue hedgehog is one of the best known video game characters of all time? (5) |
| GRASS | Common plant of which blue fescue is a compact ornamental type (5) |
