Catalyst metal powder mainly has iron-based and nickel-based two kinds of materials. It is formed by the process of burdening in proportion, mixing, melting in high temperature, spaying in high pressure( water atomizing and air atomizing ) and vacuum drying. It is very good menstruum of synthesizing diamond. The menstruum we produced has features of uniform particles, granularity concentration, high resistance to oxidation, well and even bonded with graphite. The diamonds synthesized with this catalyst metal power have the characters of good crystal, golden color, even grit distribution, granularity concentration, high impact strength in room temperature and high temperature and less inclusions. The granularity and formula can be adjusted according to diferent diamond production craft dema...