The worldwide bestselling DK Eyewitness Books® series has been redesigned, reinvigorated, and updated with the latest information for a new generation of explorers! In Crystal & Gem, readers discover the many different varieties of crystals and gems, from the rarest crystal to the most common stone. Readers explore the many uses of rocks – from dazzling jewellery to diamond cutting tools to the silicon chip in their phone. All Eyewitness Books® are written in easy-to-understand language, fact-checked by expert consultants, and include stunning photographs and helpful topical charts. Recommended for ages 8 and up.