Dancing Bear Rock and Mineral Geology Education Collection - 18 Pcs of Gem Stones w Identification Book. Box and 2 Velvet Pouches Included! Geology Gem Kit for Kids Brand ROCK AND MINERAL GEOLOGY EDUCATION COLLECTION-18 gem stones, Rock & Mineral booklet, 2 velvet pouches and box included. IDENTIFY EACH STONE WITH THE BOOK and have fun while learning about geology. Each hand picked stone measures approximately .75-1 inch MONEY BACK GUARANTEE-if you are not completely satisfied, Dancing Bear will gladly refund your money plus shipping costs both ways. ASSEMBLED IN THE USA--by our dedicated team in Eugene, OR.