Discover how Earth was formed. See how different types of rocks have developed over billions of years. From granite and basalt to marble and slate, Rocks: Igneous & Metamorphic Rocks tells the story of how these are formed and how man has learned to use them.

"DK Smithsonian" at head of title. Content previously published as "The Rock and Gem Book" in 2016. Includes index.

Our rocky planet -- The rock cycle -- Rocks -- Igneous rocks -- Devils Tower -- Granite -- Mighty spikes -- Volcanic rocks -- Basalt -- Violet Earth -- Metamorphic rocks -- Marble -- Cutting cliffs -- Index and acknowledgments.