What is the difference between a rock and a gem? What makes the Hope Diamond so special? Why are some minerals fluorescent? Dig deep to find the answers in The Rock and Gem Book. Filled with over 1,200 stunning full-color photographs, The Rock and Gem Book is the perfect encyclopedia for young geologists to consult. Chapters are organized according to scientific classifications with straightforward explanations that bring each specimen to life. From the quartz in watches to the limestone in the Great Pyramids, the earth's natural treasures are used in architecture, art, and science. Get up close to diamonds, rubies, pearls, and sapphires, and study the different types of rocks, from granite to meteorites.