The stuff you place to the tumbler specially to shine the rocks in the final phase is usually made of cerium oxide, tin oxide, chrome oxide, or aluminum oxide. It is a form of grit historically known as a polishing compound and is amazingly great. The upper the grit selection, https://www.facebook.com/permalink.php?story_fbid=pfbid02SU2JA3ERkPA8YvF6rd3D1Cb2uG7aQ1nY5f4f7hdqtAoyqUYTVbeJwSW2EnmfShZ9l&id=61562415773754&__cft__[0]=AZW0KrBzksklvH5ZksGoPIrYHT7ilCzDV0-IkqX6x-3aCKL_Q6wAz7XlrdxUu_ciLW7TqCsq6nTQAXmfYEGEWPhTs3uY2JQ6iHMOiUJaWsUMfaFKxKtBmzgR1Ml4Edf1uHdJlzUBrq6Mh1JL7kdEVUOYuLcwgDWaK_AOBbJDdIZxb2Kja_1JNIUDecmLrSSaA8zsL5PbApMxRrLG6ByfrKZ-&__tn__=%2CO%2CP-R