| Answer | Crossword Clue |
|---|---|
| MICA | Heat-resistant mineral. |
| MICA | Heat-resistant mineral |
| MICA | Mineral resistant to heat. |
| MICA | Mineral resistant to heat |
| TALC | Mineral resistant to heat, electricity and acid |
| magnesite | A whitish mineral consisting of magnesium carbonate, used as a heat-resistant lining in some furnaces |
| asbestos | A heat-resistant fibrous silicate mineral that can be woven into fabrics, and is used in fire-resistant and insulating materials such as brake linings |
