This is the ultimate photographic guide to the world of rocks and minerals, as well as how to build your own collection.An extensive introduction section describes the impact of factors such as time, weather and water erosion on the development of these substances, and the part played by natural phenomena such as volcanoes and earthquakes.Specimens are grouped according to their chemical composition and characteristics, and all entries include quick-reference identification checklists to aid recognition.A scientific introduction looks at the origins of these materials and their impact on the landscape, with examples of striking natural formations and explanatory diagrams.The amateur geologist is shown how to identify specimens by their appearance, texture, hardness, and density, as well as how to extract samples safely, how to clean and store rocks and minerals, and build and present their own collection.Featuring over 800 images, this book is a classic illustrated encyclopedia and field guide on an endlessly fascinating and richly consuming subject.