“…SEM results show that the levels of elements C, Mg, Si, Ti, Al, V, S, Na, Cr in the investigated magnetic materials are quite large. This is in agreement with previous studies, where the magnetic iron sand retrieved from Banten, Indonesia showed the presence of many different impurities, like Ti, Al, Ce, Co, Cr, Eu, La, Mg, Mn, Na, Sc, Sm, Th, V, Yb and Zn [21]. The iron oxide from Aceh iron sand is predominantly composed of magnetite (Fe 3 O 4 ) or ilmenite ((Fe,Ti) 3 O 4 ) ( Figure 5).…”