Is there a book on coin metals for the nonscientist? Searching how to identify coin metals online brings up a great deal about scrap and some rather harsh techniques, I don't think I'll be dropping a vintage medal in muriatic acid ... I liked one fellow's take on finding out if it's brass or gold: "Take it to a pawn shop." Various reference works help randomly for comparisons but it would nice to have something specific, preferably with great photos ... or maybe readers know of a web site where all this is done?