Nope. Not die cut or milled. Cast.May be a bad casting. Likely a nickel alloy. Even with a good casting if quenched after casting or heating nickel white gold becomes extraordinarily brittle. To be annealed it must be heated and air cooled. The exact opposite of red or pink copper gold alloys. I highly recommend that every metalsmith should own James Binnion’s book. [New Book] Jewelry Metals by James Binnion