Ceramic media, large size (3/8" x 5/8"), is sold in one pound packages. This a non abrasive media used as a separating and carrier material for tumbling stones, also used as a burnishing media on jewelry metals. A separating material helps speed up the process of tumbling when any flat material is being tumbled polished. When tumbling rocks, to get faster results, 25% of the load should be small stones or use ceramic media. The ceramic media can be easily washed or rinsed and reused again in the next grit stage.