It will not be porous like lava rocks are It may , So, if you grind off a small spot on your suspect rock and find bright shiny metal spots this is another good , Fresh meteorites may not make brown powder but older stone meteorites usually will.
How do you grind the molten bucket, in Tony Hawk Pro Skater 3? , one of the bars and grind Then the bucket will malfunction and fall into the molten lava , In the next chapter in the Tony Hawk series, pros challenge you to make your mark.