| Shell liners |
| Pearly shells |
| Pearly layers |
| Abalone products |
| Button materials |
| Mother-of-pearls |
| Shellfish products |
| Nautilus shell liners |
| Mother-of-pearl sources |
| Buttonmakers' materials |
| Mollusk shell materials |
| Mother-of-pearl materials |
| Pearly linings in mollusks |
| Inner layers of some shells |