Sand is not a good substitute for rock tumbler grit because it is not as hard, usually has rounded particles, and running it in a tumbler for extra time will have a higher electricity cost than the savings on grit.
Disposing of Rock Tumbling Grit & Slurry: 6 Proven Methods
Tumbler Sanding Kilted Craft Works
60/80 Tumbling/Lapping Grit
HOT BEE ROCK TUMBLER - GREAT SCIENCE KITS FOR KIDS&ADULTS ! , Description , Nature gently polishes the stone in water, sand or gravel until all the
Hot Bee Rock Tumbler Polisher Science Kits Set for Kids and Adults, Tumbler Grits, Rocks & Jewelry Polishing Accessories Set
I got a rock tumbler and after going through the four phases, the
Ultimate Beginners Guide to Rock Tumbling
* PREMIUM COARSE GRIT – Contains TWO Jars of 1 lb. 60/90 Coarse Silicon Carbide Grit for Stage 1 polishing. Enough for ten 3 lb. tumbles. * QUALITY
Rock Tumbling Grit – Two Pack Step #1, Coarse 60/90 Silicon Carbide - 2 Lbs.
How to Polish Rocks (with Pictures) - wikiHow
4 LBS Rock Tumbler Grit Step 1 -Coarse Grit(60#), for
The Best Grit for Rock Tumbling: A Comprehensive Guide
Best Rocks for Tumbling: Why Some Work & Others Don't – Rockhound
The Results: Can you use sand to tumble rocks?