| Answer | Crossword Clue |
|---|---|
| umangites | UMANGITE, a mineral consisting of copper selenide |
| umangite | a mineral consisting of copper selenide |
| covellite | A blue mineral consisting of copper sulfide, typically occurring as a coating on other copper minerals |
| tetrahedrite | A gray mineral consisting of a sulfide of antimony, iron, and copper, typically occurring as tetrahedral crystals |
| chalcopyrite | A yellow crystalline mineral consisting of a sulfide of copper and iron. It is the principal ore of copper |
| 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 |
