The BGS mineralogy and petrology collections contain upwards of a million samples, housed at Keyworth and in Edinburgh. Roughly a quarter of this is prime material arranged into a number of major archive collections denoted by alphabetical prefixes :
| Prefix | Description | Location |
|---|---|---|
| C | UK Continental Shelf thin sections | Keyworth |
| E | English and Welsh samples with thin sections | Keyworth |
| ED | General collection, some with thin sections | Edinburgh |
| EMC | Display quality specimens previously in the former Geological Survey gallery of the Royal Museum of Scotland | Edinburgh |
| F | Overseas samples with thin sections | Keyworth |
| G | Polished thin sections | Keyworth |
| PB | Polished blocks | Keyworth |
| MR | General collection, hand specimens only, many of display quality | Keyworth |
| MC | General collection, hand specimens only, many of display quality. Includes minerals. | Edinburgh |
| N | Scottish samples with thin sections | Edinburgh |
| RC | Minerals | Keyworth |
| S | Scottish samples with thin sections | Edinburgh |
| UG | Minerals | Keyworth |