VIYUKI Professional Rock Tumbler Kit Includes Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings,Operating Instruction, Great Stem Science Kit

Create Your Gemstones: Best rock tumblers make any stone sparkle and polish everyday rocks into dazzling gemstones! This rock tumbler kit makes it fun and easy to turn rough rocks into shiny, polished gemstones, thanks to its simple operation and durable design.

Control with 3 Speeds & 7-Day Timer: The digital panel gives you full control over every stage. Choose from 3 speed levels, program up to 7 days, and enjoy features like auto shutoff, memory recall, and a polishing progress log. Ideal for repeatable, hands-free use, this polishing machine delivers consistent results.

Complete Hobby Tumbling Kit: Tumbler kit includes low-noise barrel, polishing grits(4 bags ), rough gemstones (0.5 lb in a bag), jewelry fastenings, extra screwdriver/mesh strainer, and a detailed operating instruction. Sturdy and holds a good amount of rocks. Quiet rubber drum.

Easy to Use: Rock tumblers are small machines, usually small enough to rest on a tabletop. Rotary tumblers' simple instructions and one-touch settings make rock tumbling fun and easy. Control the number of days for each tumbling cycle with the one-touch timer and automatic shutoff feature, set it and forget it! Ideal gift for interested found exploring nature.

A Fun and Educational Hobby For All Ages: No matter how old you are, rock collecting can be a fun, interesting hobby. It doesn’t require any special knowledge — all you have to do is find a few rocks that catch your eye in your yard, and you’re ready to go — but you can learn quite a bit along the way about different types of rocks and how they’re formed.