The effect of ball size of milling on magnetic properties and composition of Arta Sand Beach Pariaman has been studied. The sand beach was processed utilizing the iron sand separator to obtain the concentrate I. Concentrate I was milled by Ball Milling method using various ball sizes such as 0,3, 0,5, 0,8, and 1,5 cm. Separation of magnetic and non-magnetic particles resulting from Ball Milling…