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Dig deep to discover our rocky planet, packed with natural wonders. Earth's extraordinary minerals, gems, shells, and fossils are all on dazzling display in this essential visual encyclopedia for children. Feast your eyes on the ultimate treasure trove that any pirate would envy. More than 1,000 stunning photographs showcase rocks and gems in glorious detail, ensuring you can recognise sedimentary from sandstone, metamorphic from marble, and pyrite from pearl. The unique qualities of each eye-catching material are described in-depth, together with their broad range of uses in art, industry, architecture, and science. Keep your eyes open for rainbow rocks, fluorescent minerals, priceless diamonds, and meteor showers on your geological journey of discovery. Meet dinosaurs in the prehistoric period to understand how fossils form, join the pyramid builders of ancient Egypt to investigate the limestone bricks, and take a dip in the ocean on the hunt for clams, cowries, and cockles. Treasure seekers, get set to start your own collection with The Rock and Gem Book.

Originally published: London: Natural History Museum, 2022, as: The Natural History Museum book of gemstones: a concise reference guide.

This colorful book offers you a window into the world of Mahatma Gandhi, one of the most amazing people of the twentieth century. You will learn about Gandhi’s life—from his time as a student in London to his work for equality in South Africa and India—and his methods of peaceful, but not passive, resistance to injustice.

Newly updated and expanded, COLORED GEMSTONES gives you all the information you need to buy, collect, sell— or simply enjoy—sapphires, emeralds, rubies and other colored gemstones with confidence and knowledge. With more varieties than ever before to choose from, including altogether new gems, revolutionary new cuts and new ways to buy gems—such as Internet auctions and TV shopping—there has never been a more exciting time to buy or collect colored gemstones. But there are also new high-tech treatments and sophisticated frauds to look out for. Lack of information, error or misrepresentation can make the thrill of buying a gem or piece of jewelry confusing, intimidating, overwhelming and costly. Buyers need a source of expert guidance. This practical, comprehensive, easy-to-understand guide provides all the information you need in order to know what to look for, and what to look out for, including: What qualifies as a “gemstone”? How to evaluate color—and its impact on price. Deciding between a natural gem and an enhanced gem ... and new glass-gemstone compositions. Colored gemstone synthesis and treatment. What to ask when buying the stone. What to get in writing. How to get what you want within your budget. Price guides for popular gems, opals and synthetic stones. Important information about buying on the Internet. ... and much more! Written by an “insider,” this easy-to-read guide is the “unofficial colored gemstone bible” for anyone who wants to get the most for their moneyand enjoy what they have purchased.