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I am using nat geo hobby tumbler . This is my 3rd batch nothing is working. I made sure to clean the barrel and rocks very well between stages, and I have

Plastic Pellets are resistant polypropylene, which can cushion the impact of stones on the machine and reduce the noise,Plastic Pellets Tumbling

4 LBS Rock Tumbler Grit Media 5 in 1 Kit,Inculd 4 Steps Rock Polishing Grits + 2 Bottles Refill Plastic Pellets for Reduce noise and rock damage,Work

Black Silicon Carbide Lapidary Rock Tumbling Grits

Discovery #Mindblown 18-Piece Rock Tumbler Set with Polishing Machine, Rocks & Jewelry Accessories, Multicolor - Yahoo Shopping

Simond Store Ceramic Tumbling Media Rock Tumbler Lapidary Filler - 20lb

Instructions - Bellevue Rock Club

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