I don't think it's a meteorite, but I could be wrong, you need to do some testing to help advance the possibilities of it being or not being a meteorite.
Here's a couple of links, the first is a site by Geoff Notkin, a very knowledgeable meteorite hunter a collector, this page on his site will help you further test your suspected meteorite, if it passes all the tests, then you will need to send a small slice/section to in to an expert for further testing/analysing.