C1 Rock Tumbler Kit - Professional Large 2.5LB Capacity, Up to 5X More Noise Cancelling, Adjustable Timer & Speed with Full Accessories & Memory Function

Great product. Works well, tumbles relatively quietly in the rubber drum. Easy to load/unload rocks for the various stages. Easy to set up the duration in days and speed required. Excellent instruction manual. Would recommend to buy for anyone interested in seeing the beauty hidden away in some fairly common rocks..

This is well built and not at all a toy. We're only partway through our first set of rocks but we eagerly anticipate each new tumble. There was an issue with the drum but the company very quickly addressed it and sent a replacement. Very impressed.

Grandson loves his tumbler

My husband bought me a Koolstone 2.5LB Professional Rock Tumbler Kit in October 2022. I was having so much fun, I decided to purchase a 2nd one. Upon arrival, I was disappointed to find that one of the pulley wheels was damaged and an error code displaying. I contacted KoolStone support and Daisy responded within a couple of hours! After discussing the problem, KoolStone shipped out a new tumbler base and within 4-5 days I was back in business. Daisy even followed up afterwards to ensure everything was running properly now. Best customer support I've received in a long time! Overall, the kit includes everything needed to get started with rock tumbling. About 1lb of rough rocks are included, though for total beginners I recommend studying up on rock identification and separating those with a lower Mohs hardness. My kit had obsidian and sodalite which are a bit softer than the quartz, agate, and jaspers that can all tumble together well. The sample grits work pretty well. I didn’t have as much luck initially with the polish included, but as a beginner I likely may have removed them from the pre-polish stage prematurely or skimped on the wash cycle before moving onto polish. If you don’t have additional rough rocks, especially of a smaller size, be sure to use enough of the ceramic media included to cushion the rocks and transport the grit. I’ve since purchased additional grit and media in larger quantities (the Polly Plastics kit isn’t bad, but I’ve come to prefer ordering from the Rock Shed). If you’re not happy with the results, you can always return to a previous stage and try again! Patience and practice is key here :) The kit also includes various jewelry findings to make spiral cage necklaces, keychains, and more. I am grateful this kit includes extra replacement belts. In the 5 months I’ve been running these tumblers, I’ve replaced one belt on each. Overall, I’d highly recommend the KoolStone 2.5LB Tumbler kit to anyone looking to get started! I’ve had a blast trying different types of stones and methods of tumbling/polishing, and the results are just awesome. And despite some initial problems, KoolStone stands behind their products and is committed to providing amazing customer service!

My 8yr old daughter wanted a rock tumbler for her birthday and I am very happy with this model. It works great, it’s easy to use, and it’s easy to clean. The only thing I would say is that you should read the instructions closely because I didn’t read them closely enough for the final stage. If I had, my rocks would have been more polished had I made sure to follow the steps. That being said, it was my own fault because the instructions were clear and easy to follow, I was just in a hurry😄. I’ll update in the next batch when I follow the instructions with more precision. Customer service is very helpful and you get free belts and another rock sample if you send in the code. The tumbler does make some noise, but that’s easily solved if you put it in your garage or a corn of your home away from everyone. My daughter loves how the rocks turned out and is very excited for the next round. As someone who always wanted a tumbler, I enjoy spending time with my daughter on this pursuit. I am very happy with the purchase and am looking forward to more rock adventures.