From the rarest crystal to the most common stone, gems from around the world are revealed in dazzling detail in this illustrated guide.  Become an eyewitness to the many different varieties of crystals and gems in this picture-led reference guide that will take you on a visual tour of the world of precious stones. Children will be mesmerized by the many uses of rocks like quartz and understanding crystals – from dazzling jewellery to diamond cutting tools and the silicon chip in their phone. This illustrated guide for kids aged 9+ reveals what exactly crystals and gems are, how they’re formed, how to identify them, and how they can be used in everything from microchips to jewelry making. Throughout the pages of this newly-revised book on precious stones, you can expect to find:  - A fresh new look; new photographs, updated information, and a new "eyewitness" feature. - Amazing facts, updated diagrams, statistics, and timelines. - Brand new eyewitness accounts from experts in the field. Eyewitness Crystal & Gem features striking full-color photographs of beautiful stones, including pearl and shell, jet and amber, quartz crystals, precious metals gemstones and much more!  In this guide, curious children can find the answers to questions like, how can a rough diamond become a show-stopping centerpiece? Where does labradorite get its colors? Why are there quartz crystals in clocks and watches? How can crystals be grown in a laboratory?  So, what’s new?  Part of DK’s best-selling Eyewitness series, this popular title has been reinvigorated for the next generation of information-seekers and stay-at-home explorers, with a fresh new look, up to 20 percent new images, including photography and updated diagrams, updated information, and a new "eyewitness" feature with fascinating first-hand accounts from experts in the field. Explore the series! Globally, the Eyewitness series has sold more than 50 million copies over 30 years. Travel through the solar system with Eyewitness Space, discover the incredible world of creepy-crawlies in Eyewitness Insect, or take a trip aboard the most famous ship in history with Eyewitness Titanic.