Collins Discovery Guides Rocks and Minerals of the World.
 
Includes 220 of the rocks, minerals and gemstones you are most likely to see, each one fully described and illustrated in full colour.
 
ID fact file for each rock lists key features to help you make an accurate identification.
 
Features a photograph of each of the rocks, with line drawings showing the crystal structures.
 
ISBN  978-0-00-778538-4