| Answer | Crossword Clue |
|---|---|
| tennantite | a blackish lead-gray mineral, a sulphide of arsenic and copper |
| tennantites | TENNANTITE, a blackish lead-gray mineral, a sulphide of arsenic and copper |
| zinkenite | a steel-gray metallic mineral, a sulphide of antimony and lead also ZINCKENITE |
| zinckenite | a steel-gray metallic mineral, a sulphide of antimony and lead also ZINKENITE |
| zinckenites | ZINCKENITE, a steel-gray metallic mineral, a sulphide of antimony and lead also ZINKENITE |
| zinkenites | ZINKENITE, a steel-gray metallic mineral, a sulphide of antimony and lead also ZINCKENITE |
