Our bangles/cuffs are made using an environmental copper core. Gold is then bonded on top of this core. This allows us to create strong pieces that are indistinguishable from jewelry you already have. Your New Bangle: Hypoallergenic Will not tarnish Resist dings and dents Pliable enough to customize the fit I have 14 k listed also. Please see the photo for color difference. Your jewelry will arrive packaged for gifting.