The gold is heated (annealed) to around 800 degrees Celsius at the beginning to soften it, allowing it to be shaped. When it gets to its final shape it is hammered to harden it. The last hardening process is to allow the semi-finished piece to age for 24-36 hours in an oven at 350-400 degrees Celsius. Gurhan has not only taken the original techniques of the ancient goldsmiths, but he has improved upon them in many ways which are proprietary to his methods of production.