Smithsonian Rock Tumbler STEM Kit Includes Charm Accessories for Charm Bracelets, Rings & Key Chains

NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - Gemstone Mix of 9 varieties including Tiger's Eye, Amethyst and Quartz - Comes with 4 grades of Grit, Jewelry Fastenings and detailed Learning Guide

NATIONAL GEOGRAPHIC Rock Tumbler Mega Refill Kit - 3lbs Gemstones of 9 Varieties Including Tiger's Eye, Amethyst & Quartz - 4 Grades of Grit, Jewelry Fastenings & Detailed Learning Guide

National Geographic Break Open 10 Premium Geodes - Includes Goggles, Detailed Learning Guide & 2 Display Stands - Great Stem Science Gift for Mineralogy & Geology Enthusiasts of Any Age

Fantasia Materials: 2 Pounds of a 12 Stone Mix from Madagascar

My Book of Rocks and Minerals: Things to Find, Collect, and Treasure

Smithsonian Electronic Crystal Growing

Tonmp 3 Pounds Rock Tumbler Refill Grit Media Kit (4 Polishing Grits)| 4-Steps for Tumbling Stones

NATIONAL GEOGRAPHIC Rock Tumbler Refill - 3.28 Pounds Tumbling Grit Media for Stone Polisher, Works with any Rock Tumbler

STEM Starters for Kids Geology Activity Book: Packed with Activities and Geology Facts

NATIONAL GEOGRAPHIC Mega Crystal Growing Lab - 8 Vibrant Colored Crystals To Grow with Light-Up Display Stand & Guidebook - Includes 5 Real Gemstone Specimens Including Amethyst & Quartz