Explore the treasures of the Earth - sparkling crystals, vibrant gemstones, and age-old fossils - with this illustrated guide that's sure to captivate every rockhound and budding gemologist. From primeval origins to their astonishing modern-day uses and appeal, this is the ultimate portrait of Earth's geological riches - rocks, minerals, crystals, and gems. Also included is a focussed look at other precious materials often prized for...