| Reference | F7 |
| NAME | Flash |
| TYPE | Sandstone |
| GEOLOGY | Upper Carboniferous. Millstone Grit |
| COUNTY | Derbyshire |
| COLOUR | Light buff/cream with some purple/black bands |
| TEXTURE | Medium grained grit |
| BLOCK SIZE LXBXH (mm) | 1000x600x500mm |
| SUITABILITY | Ashlar, walling and cladding |
| USES (1) | |
| USES (2) | |
| USES (3) | |
| USES (4) | |
| Stone Names | Chatsworth grit |