| Answer | Crossword Clue |
|---|---|
| pyrargyrites | PYRARGYRITE, a deep-red to black silver ore |
| pyrargyrite | a deep-red to black silver ore |
| zincites | brittle, deep-red to orange-yellow mineral, native zinc oxide, ZnO, usually massive or granular: formerly an important ore of zinc |
| zincite | brittle, deep-red to orange-yellow mineral, native zinc oxide, ZnO, usually massive or granular: formerly an important ore of zinc |
| cuprites | mineral, cuprous oxide, Cu2O, occurring in red crystals and brown to black granular masses: an ore of copper |
| cuprite | mineral, cuprous oxide, Cu2O, occurring in red crystals and brown to black granular masses: an ore of copper |
| hematite | very common mineral, iron oxide, Fe2O3, occurring in steel-gray to black crystals and in red earthy masses: the principal ore of iron |
