How to Make Your Own Rock Tumbling Grit (Free PDF Guide) Rock tumbling is an incredibly rewarding hobby, but constantly buying commercial grit kits for all four stages can get expensive very quickly. If you are looking for ways to cut costs and want to know how to make your own rock tumbling grit at home, this downloadable PDF guide breaks down the most effective DIY alternatives and household substitutes. The internet is full of confusing advice about what you can and cannot put in your tumbler barrel. While you cannot easily manufacture industrial-grade silicon carbide in your kitchen, there are several proven homemade rock tumbling grit recipes that budget-conscious rockhounds use every day. This printable guide cuts through the noise and provides safe, practical solutions for tumbling rocks without expensive grit. What is inside this PDF guide?