This is Steven Banks' The Magpie's Collection: A guide to things found. It's a comprehensive guide published in 1978, of materials and items that can be found, often in gardens, sheds, fields and junk shops, and kept, and may even be of value.
Illustrated by Nicholas Griffiths, the content covers ceramics, metals, glass, and minerals.
The Magpie's Collection: A guide to things found - by Steven Banks
Very good condition considering its age and use, although there is some wear visible at the top of the spine and to the edge of the dust cover.