RockTumble Promo Codes & Coupons September 2026 — Up to 20% Off

Experts in stone glasses and rock glasses are used to roll and polish rough rocks, stones and pebbles including stones and pebbles and glass found on the beach! RockTumble's high-quality British-made gem processing machine provides professional surface treatment for your samples. The glass can be used with a variety of grit, the most common being silicon carbide grit and zinc oxide. All of their stone glasses come with a one-year warranty and full customer support. RockTumble sells complete stone rolling kits for beginners. For example, its metal detector and coin cleaning complete equipment, their 3-pound metal cleaning, barrel tumbler machine is fine-tuning coin cleaning or metal detector discovery cleaning. It comes with a plastic bucket and is an excellent machine for metal polishing and jewelry cleaning. The kit comes with a special finned bucket to help flip metal and coins.