Discover the science of gems and precious minerals! In this collector's kit, budding gemologists will find 29 tumbled gems that sparkle and shine. A fully illustrated book includes a field guide to the included rocks, plus tons of fun facts and nonfiction content. Gem lovers will also learn about birthstones, 12 of which are included in your starter collection. Use the included chiself and hammer to break out the gem-shaped dig kit to discover a bonus specimen!