there is “amulet” if you want to go with “lets” (which started off as ”-lettes” btw). I suppose the one around the neck is called a “necklace” for the simple reason that it started off as a lace with perhaps a seashell on it. It was much later that people could afford golden chains and so on. btw “brace” just means “arm” so anything you put on your arm is already a “bracelet”. We could of course have “leglets” or “hiplets” by that logic.