How are fossils formed? What makes diamonds so valuable? What do line colour and degree of hardness have to do with value? The KOSMOS Children's Nature Guide shows the 85 most important minerals, fossils and gemstones. In addition, it gives useful tips and tricks for identifying, recognising and collecting rocks. In addition to practical identification flaps and lots of additional information on the respective species, the book also offers numerous ideas for hands-on activities, e.g. how children can prepare fossils themselves or properly store their own mineral collection. Recommended by NABU. Sustainably produced using the cradle-to-cradle method.