Found this a few years back it is magnetic but not super strong. Found with a bunch of others rocks of the same nature on the edge of a salt water bay
. Thanks for the look. I have more if u want pics
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.
Don't get me wrong though, in no way am I saying it's impossible to find a placer deposit rich in them. Just the likely hood of doing so is rarer than winning the lottery. Thought I would add that to give perspective.
Another perspective is I've seen impactites around old deep impact sites. Enough to fill semi after semi... So that's not uncommon and is pretty much useless except for studying the site and structure. I'd be checking maps for sites if basic testing led me to believe otherwise and start the research process. However arguing a point with someone with credentials is next to impossible as they don't like to admit when they're wrong, however I did manage to acquire a pile of apology letters from the Smithsonian.