National Geographic Rock Tumbler Kit

This kit includes a variety of rocks, gems, minerals, and fossils, including aventurine, rose quartz, snowflake obsidian, desert rose, red jasper, blue quartz, pumice, and geode specimens. It also contains real fossils, including prehistoric gastropods, ammonites, clams, brachiopods, and more. The price drops from $24.99 to $14.68. Shipping is free for Prime members or on orders over $35.