What you could possibly do, is that you could use a magnet to seperate iron fillings. use filter paper to seperate the salt and the pepper into like a beaker or a cup or any type of container leaving only the sand alone. afterwards, use a type of second filter paper that could seperate pepper from the salt and there you are, you have Salt Pepper (Nice things to put on fries) Iron Fillings Sand Mixture What type of mixture this is, is a heterogenous mixture.