| Answer | Crossword Clue |
|---|---|
| germanite | a complex mineral, basically copper arsenic sulphide |
| germanites | GERMANITE, a complex mineral, basically copper arsenic sulphide |
| 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 |
| chalcocite | a greyish-black mineral, native copper sulphide |
| chalcocites | CHALCOCITE, a greyish-black mineral, native copper sulphide |
| polybasite | a grey to black mineral consisting of a sulphide of silver, antimony, and copper in the form of platelike monoclinic crystals |
| polybasites | POLYBASITE, a grey to black mineral consisting of a sulphide of silver, antimony, and copper in the form of platelike monoclinic crystals |
