Real gemstones from Madagascar! 1 lb. Of raw rocks includes rose quartz, labradorite, red jasper, yellow jasper, indigo gabbro, and Polychrome jasper. Quantities of each gemstone may vary. Four grades of grit - Coarse, medium, fine, polish. Transform your raw+ stones from rough rocks to dazzling gemstones! This refill kit also works with all rock tumblers. Jewelry fastenings - Additional rock tumbler accessories include 1 necklace, 1 set of earrings, 1 keychain, 1 ring. Create custom jewelry from your newly polished gemstones! Learning guide - our learning guide will teach you all about these unique gemstone specimens and includes many amazing and fascinating facts Respected quality - NATIONAL GEOGRAPHIC is proud to provide only the highest quality STEM toys and all our kits are backed by our 100% satisfaction guarantee