Unearth our planet's glittering treasures--a fascinating book of gems for kids 6 to 9 What do dusty old rocks have to do with the shiny, colorful jewels that you see in rings and necklaces? Everything Set off on a journey inside Earth and learn the different ways our planet uses rocks and minerals to make gemstones. Discover how some grow in red-hot magma deep underground, while others are made by animals or plants,...