Smithsonian Rock & Gem: The Definitive Guide to Rocks, Minerals, Gems and Fossils

Smithsonian Rock & Gem: The Definitive Guide to Rocks, Minerals, Gems and Fossils  From the primeval origins of rocks and gems to their astonishing modern-day uses and appeal, this is the ultimate portrait of the Earth’s natural treasures. Highly recommended by the Fossil Cartel staff.