Not to confuse things but Magnetite is one of the mineral components of basalt. So, yes to both in a way. I am a rank amateur but the crust thing is problematic. There are things that look like crusts such as desert varnish and it's very difficult to differentiate by looking at photos. Experts also say that old weathered meteorites may not have a fusion crust. Take it to someone knowedgable is really your best option. You also need to determine what the shiny stuff is inside. When it is proven to be Iron nickel, you might have a meteorite. Good luck.