You have to use an alternative with a hardness of a lot more than 7 around the Mohs scale; if not, you may just be wasting electricity by operating your tumbler. An alternative is To place the slurry within a shallow open up bucket or related container and depart it https://www.facebook.com/permalink.php?story_fbid=pfbid0NNw1bv5aZgz2gP6Xexzvnd1Ao5UWCkERH9EPmqcWDoBnCk5qru6EFBWo3EUbjCCil&id=61560512640678&__cft__[0]=AZWxI5LIql3MAvWUwgUm3NibpdMQJ2-VT-LrNE8PAqwOKuUbRHcZkH9mnA5n4t4xL8_oIRPetX8TC_XJ2pq2OAUX0kTu-VLWG3Vh2gHNgL_DI96-3l_XBo6Rtj9Z_OsRE8kWP1QUBeO5n4FVfjYrm5C4rKZJLTFyUyZAQXwOH8RDxe08YGg-MDqH-3SGZlU2zfJVydU0g266ApuBpflQtfLO&__tn__=%2CO%2CP-R