Grit is an essential abrasive material used in rock tumbling to smooth and polish stones. It comes in different levels of coarseness, typically measured in grit sizes, which determine how fine or rough the material is. Coarse grit (often 60/90) is used in the initial stages to grind and shape rough stones, while finer grits (like 500/600 and 1000) are used in later stages to smooth and polish the surface, bringing out the stone's natural luster.
Tumbling media refers to various materials—like ceramic pellets or plastic beads—that are added to the tumbler along with grit and stones. These media help cushion the stones during the tumbling process, ensuring even polishing while preventing excessive chipping or cracking. They also help to maintain a consistent tumbling action, promoting better results in the final polish.
