Gold filled is an actual layer of 14K gold (rose gold is 20K), pressure bonded to a brass base metal. Gold filled has 100 times more gold than gold plating and is much more valuable and tarnish resistant. It does not flake, rub off, or turn color. It can be worn without worries of an allergic reaction to the jewelry. Gold filled jewelry is an economical alternative to solid gold, and should last many years. It is a keepsake quality material.