Hello Nappy, I don't see any....... but that is NOT the definitive answer. You would best be served by acquiring O Richard Norton's book The Field Guide to Meteors and Meteorites. It has a simple chemical test for nickel in it. A vast majority of space rocks (including most stony m's) have SOME nickel/iron in it. The combination of nickel/iron is so rare in surface earth rocks (earth's core is nickel/iron though) that the test in the book is considered a very good test to determine if your rock(s) are meteorites. Try it. TTC
Try this... "Scrape the specimen across a piece of unglazed tile. If it leaves a black or red trail, it's probably an iron oxide concretion." (From The Art of Collecting Meteorites" Kevin Kichinka) TTC