| Answer | Crossword Clue |
|---|---|
| gahnites | dark-green to black mineral of the spinel group, zinc aluminate, ZnAl2O4 |
| gahnite | dark-green to black mineral of the spinel group, zinc aluminate, ZnAl2O4 |
| hornblende | dark-green to black mineral of the amphibole group, calcium magnesium iron and hydroxyl aluminosilicate |
| ceylanite | a mineral, pleonaste, a dark-green to black variety of spinel also CEYLONITE |
| ceylonite | a mineral, pleonaste, a dark-green to black variety of spinel also CEYLANITE |
| ceylanites | CEYLANITE, a mineral, pleonaste, a dark-green to black variety of spinel also CEYLONITE |
| ceylonites | CEYLONITE, a mineral, pleonaste, a dark-green to black variety of spinel also CEYLANITE |
