The stuff you place to the tumbler specifically to shine the rocks in the final phase is normally made of cerium oxide, tin oxide, chrome oxide, or aluminum oxide. This is a kind of grit usually called a polishing compound and is extremely high-quality. More Wonderful Grits (four hundred �?600+): https://www.facebook.com/permalink.php?story_fbid=pfbid02t5PjjArqP3gPPD1S5n8JHwaZEfNndEsPy9eGu73RNrHLmB7wxu7qmEiraP76ixvfl&id=61560512640678&__cft__[0]=AZVqZacmreRyWOK2QfvlRqEpGBA9HDc7c1EshSy-jKuDSDV6gY5bF7GIwsfV3r_cpduxJZGnLP-Ggd4_k05x6a4koLTbhDC850I0kpFqD6G7Ub2ticKGX40qbtVC4Ka83pFsAlDfaARiHHkA1D8nJTXeWzuszwUZAvx4ivY9_o_5OEXEqeS0vdg4Z8Di3OTzVvB99LEM5ishXwB79AfsnszC&__tn__=%2CO%2CP-R