Eyewitness Rocks and Minerals

Become an eyewitness to the rocks and minerals beneath your feet, covering everything from volcanic rocks and shiny gemstones to ancient marble and fallen meteorites. Did you know that every rock is a combination of one or more minerals? Or that marble was first used in ancient Greece but still forms deep underground as you read this? Unearth the hidden treasures of the earth's surface, and find out how they all came to be here.