I take that it is magnetic..that is one of the indicators...My self I check for mineral content. I would check for Iron, Nickel, Magnesium, cobalt, silicate, bronzite and iridium...If 4 of these minerals are present the odds are good that it is a meteorite..If you want to sell it you will need to be checked by a lab..If you are going keep and display it the only one it matters to is you...Art