Look up close at rocks， minerals and sparkling gems to unravel the clues to classify and identify them. Find out how they were formed， where in the world they're found and how to start your own rock collection. DK Adventures is a nonfiction series for kids ages 8-11 featuring visually rich theme spreads， and fascinating facts that help kids build their skills in vocabulary， grammar， comprehension， and critical thinking while developing a love of reading. Designed to keep interest high， build knowledge， and enrich the reading experience with fascinating background information， each title in the DK Adventures series is filled with information yet eminently accessible， and available in a wide range of kid-favorite topics including rain forests， animals， rocks， and shipwrecks.