Author - Ronald Bonewitz 

A great guidebook featuring full-color photos of hundreds of rocks and gems for collectors and enthusiasts, created in collaboration with the Smithsonian Institution and written by a geologist with decades of experience. Author Ronald Bonewitz started his career as a geologist specializing in crystal chemistry, worked as a mining scout in the field, and now serves as a gem, mineral, fossil, and antiquities expert at an auction houses. Rock and Gem combines his knowledge with hundreds of stunning photos from the Smithsonian's extensive collections, making professional-level knowledge accessible to readers of all experience levels. In addition to resources on each of several hundred individual rock and gem types, the book contains a compelling history of how rocks are formed, starting with the Big Bang up to the present day. It also includes a guide to starting your own collection as well as several fascinating feature boxes exploring topics like the Malachite Room in the Winter Palace and the superstitions surrounding the world-famous (or infamous) Hope Diamond.