Refractory gold is in the ground gold ore trapped in sulphide lattice structures that conventional processes are unable to unlock.  The clean roasting antimony technology developed by Tri-Star sold to joint venture company, Strategic & Precious Metals Processing LLC in 2015 has opened the treatment again of these world gold resources, estimated to be 30% to 50% of remaining gold in the ground.  The second phase of SPMP’s proposed antimony plant in Oman envisages a refractory gold roaster constructed to the highest world standards that solves this problem efficiently and at low cost to provide a very valuable alternative processing route for the world’s gold resources trapped in this manner.