Feb 01, 2018· Diy Rock Tumbler. Plastic Poly Pellets Rock Tumbling Media (2 LBS) for Rock Tumbler, Stone Tumbler, . DIY (Tumbled Glass) Fullautomatic Plastic Cup Thermoforming Machine . is easy just place a few rocks or minerals into the tumbler with some grinding p. .. toy rock tumbler vibratory rock tumbler best rock tumbler professional rock.