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We spent 20 hours on study, videography, and editing, to review the top picks for this wiki. Whether you are a professional jewelry maker or just seeking a new hobby, then these rock tumblers can allow you to polish up stones of every kind for any application. Some may even work on additional materials, like metal and sea glass. We've included models ideal for hobbyists through to a couple which are sturdy enough to handle routine industrial use. When users buy our independently chosen editorial selections, we might earn commissions to support our work. Tru-square Metal THU140 The Tru-square metallic THU140 is a luxury machine. It's a 15-pound-capacity steel barrel with a rubber liner that could withstand regular heavy duty usage, making it well suited for jewelers, colleges, and labs. Best Rock Tumblers .