| GMD | Text |
| Publisher | New York, NY, HarperCollins, 1997 |
| Subject | Rocks -- Collection and preservation -- Juvenile literature. |
| Series | Let's-read-and-find-out science |
| Description | 31 pages : color illustrations ; 21 x 26 cm. |
| ISBN | 9780064451703 |
| Suitable | From 6 To 11 |