| Answer | Crossword Clue |
|---|---|
| metacinnabarite | the black solid form of mercuric 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 |
| charcoals | A porous black solid, consisting of an amorphous form of carbon, obtained as a residue when wood, bone, or other organic matter is heated in the absence of air |
| charcoal | A porous black solid, consisting of an amorphous form of carbon, obtained as a residue when wood, bone, or other organic matter is heated in the absence of air |
