How to Make Homemade Rock Tumbler Grit? [4 Easy Steps]
Steps for Homemade Tumbler Rock Grit. Step 1: As soon as you've chosen the container used to construct the rock tumbler, fill the container halfway with sand. This sand will generate abrasion on the rocks, which will aid in smoothing the rocks. Initially, coarse sand should be used. Later on, when the rocks get smoother, you may add fine sand ...