Blue Marble NATIONAL GEOGRAPHIC Hobby Tumbler - Rock Polisher for Kids & Adults, Noise-Reduced Barrel, Grit, 2.5 Pounds Raw Gemstone & Jasper Mix, Great STEM Hobby Kit

The rock Tumbler worked for seven days. Unfortunately the item was a gift for our daughter and had been put away for a month or so resulting in the sellers inability to provide replacement or warranty. I do not recommend this product

Thanks so much

Muy bien producto hasta ahora me a encantado

I have never done rock tumbling before but became interested when I found some quartz at my mother's house. She lives outside Marble Falls, Texas. I shopped around quite a bit and based off reviews alone, this was the best machine for beginners and for the price. I initially bought the one available at my local Hobby Lobby and it would leak a little water and get the belt wet. The belt system used runner teeth and after just one day of use the belt was no good and the machine would not run. With this brand the belt is smooth and operates based off tension just like the pullies in your car. The rubber barrel helps eliminate most noises. The motor is quiet, the only noise is from the machine is it vibrating on a solid surface. Mine walks a little, so make sure you have it on a level surface. I waited to do my review until I had used the machine a while. I have done two separate rounds with it. Everything runs great still after more than 2 months of continuous use. I can see that the belt will wear out before anything else. There are little flecks of the belt around the area the machine sits in. I believe there is some plastic on the pullies that may be wearing on it. It does come with an extra belt though. I am currently tumbling Tiger's Eye rocks. The pack comes with a variety of rock types. I am tumbling like rocks together just to make sure everything wears at the same rate. My only real complaint is that in all the rock packs, the amount of amethyst is rediculos. I was provided some, but the pieces were so small that they would be destroyed if tumbled. There are also too many dalmatian jasper stones compared with how many of any other stone there is. Overall I am content with how well it works.

My some was excited to use this but it didn’t last 1 month before breaking down.