First thing to check-is it attracted to a magnet? Iron meteorites will be strongly attracted to a magnet , stony ones will be mildly attracted to a magnet. Virtually ALL meteorites have some iron in them. If you are prepared to cut it and polish the cut surface, a meteorite will have a structure that looks distinctly different to regular rocks. The typical stony meteorite has a conglometation of spherical particles- not your typical earth rock. Iron meteorites are heavy , density around 8 grams per cubic centimetre (8 times water.) Do not expect to become a millionaire from your find
. Unclassified NWA stony meteorites go for 10 US cents per gram on ebay (try Dean's in NZ - I have several lots of his stony meteorites.)