Apple is the sort of company to be so obsessive about the devices they create that they'd make their own type of metal to perfect them. That's what they do. They've already done it. Apple uses cold-forged steel in one iteration of their new Apple Watch. According to Jony Ive, they're also bringing their own specially-prepared gold to the smartwatch as well. Not that this new gold is anything you'd need a new magical alchemy to concoct - this is just a matter of preparation and process.