| Answer | Crossword Clue |
|---|---|
| pentlandite | A bronze-yellow mineral that consists of a sulfide of iron and nickel and is the principal ore of nickel |
| chalcopyrite | A yellow crystalline mineral consisting of a sulfide of copper and iron. It is the principal ore of copper |
| wolframite | A black or brown mineral that is the chief ore of tungsten. It consists of a tungstate of iron and manganese |
| stibnites | A lead-gray mineral, typically occurring as striated prismatic crystals, that consists of antimony sulfide and is the chief ore of antimony |
