do a simple density and hardness test .....Iron 7.87 Nickel 8.9 cobalt 8.9 dysprosium 8.55 and soft gadolinium 7.9 ....i forget the hardness of each element but just look it up on line ...last time i looked these are the only magnetic elements ....good luck some are rare earth metals and all the meteorites i seen are dark color but who knows i very little about them