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 mesmerised 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 jewellery making.