I don't know if I know you, I have a lot of friends and hunt (detect) and fish a bit where you are. A bunch of that stuff has been found there, I have seen it showed to me by several other people. A friend of mine on island has told me that samples had been sent to a prominent university and the samples like you show are not in fact meteorites. You can PM me if you'd like to know the guys who have shown me a lot of that stuff.