I bought this large 2 & 1/2 by 1 inches 19th c. brooch years ago described (and with a murky image) as iron. So I was a little disappointed that it was not Berlin iron but hair; but let me say this, it feels like iron. Seriously. I thought, "What is this?? Atlantic Cable core?" At the time I wasn't even aware that some Victorian hair jewelry is wrapped around a hard core. It will last another 100 years at least without any stubble! It is gold-plated, but the visible gold shows no brassing.