National Geographic Rough Gemstone Refill Kit for Rock Tumbler by

Stock Up with National Geographicâ€s Raw Gemstone Refill Kit This Gemstone Refill Kit Includes: 9 types of raw gemstones (1 lb in total), 4 courses of polishing grit, 6 jewelry fastenings, 1 learning guide, and our 100% satisfaction guarantee. National Geographic Toys is proud to provide a 100% satisfaction guarantee with all our products so that you can buy with confidence. About the National Geographic Society With a mission to inspire people to care about the planet, the 126-year-old National Geographic Society is one of the world's largest nonprofit scientific and educational organizations. National Geographic's net proceeds support vital exploration, conservation, research, and education programs.