The launch of the Big Five platinum coin series, aimed at boosting investment demand for platinum, is testament to the wonderful marketing effort of leading members of the South African mining industry, said Implats CEO Nico Muller said on Wednesday. Muller heaped praise on Minerals Council South Africa CEO Roger Baxter and outgoing Anglo American Platinum CEO Chris Griffith for devoting “many, many years of work and negotiation” towards ensuring that the coin would see the light of day.