a grey or black copper ore tennantite
Crossword Clue

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AnswerCrossword Clue
fahlerza grey or black copper ore; tennantite
polybasitea grey to black mineral consisting of a sulphide of silver, antimony, and copper in the form of platelike monoclinic crystals
polybasitesPOLYBASITE, a grey to black mineral consisting of a sulphide of silver, antimony, and copper in the form of platelike monoclinic crystals
stannitemineral, iron-black to steel-gray in color, with a metallic luster, copper iron tin sulfide, Cu2FeSnS4: an ore of tin
chalcocitesCuprous sulfide, an ore of copper, usu. occurring as black, fine-grained masses
chalcociteCuprous sulfide, an ore of copper, usu. occurring as black, fine-grained masses
cupritesmineral, cuprous oxide, Cu2O, occurring in red crystals and brown to black granular masses: an ore of copper
cupritemineral, cuprous oxide, Cu2O, occurring in red crystals and brown to black granular masses: an ore of copper