The Witwatersrand once produced 40% of the world's supply of this precious stuff
He 
said this makes it hard for smaller entrants, "such as we once were", ... "Since the 
introduction of the Precious Metals Act and the Diamond Act,... [DOC] [TLE] Blogs Summary - WomEng [PAR] May 4, 2016 ... By definition, a supply chain is simply a sequence ('chain') of ... how we improve 
the state of the world amongst many other things.