If it is a rock and you found it on the beach, then it is not a meteorite. Or, if it is, nobody can tell just by looking at it. If a stony meteorite landed in the water and later washed up on a beach it would have lost its fusion crust and regmaglypts as a result of abrasion against other rocks by wave action. If it were an ordinary chondrite, it would likely have broken apart from rusting of the metal. If it survived as a rock, it would be all but impossible to identify as a meteorite just “by looking.” It would not look at all special, except maybe for some rusty spots. But, who knows? Nobody has ever found and recognized one!