| Answer | Crossword Clue |
|---|---|
| brookite | brown, red, or black mineral, titanium dioxide, TiO2, trimorphous with rutile and anatase |
| rutile | a reddish-brown to black mineral that consists of titanium dioxide usually with a little iron and has a brilliant metallic or adamantine luster |
| rutile | common mineral, titanium dioxide, TiO2, usually reddish-brown in color with a brilliant metallic or adamantine luster, occurring in crystals: used to coat welding rods |
| rutiles | common mineral, titanium dioxide, TiO2, usually reddish-brown in color with a brilliant metallic or adamantine luster, occurring in crystals: used to coat welding rods |
