The buzz from Gina Rinehart’s 70th birthday party was reportedly “so spectacular” that it drifted across the Swan River from the mining magnate’s Perth home, catching the attention of people more than a kilometre away. Four hundred guests, mostly employees, had gathered to mark the milestone of the Hancock Prospecting head, who is deferentially referred to as “the Chairman” or “Mrs Rinehart”. The gala event started with a horseback show as riders dressed in Driza-Bone jackets and Rossi boots carried Australian and Hancock Prospecting flags along the red carpet, accompanied by music from The Man from Snowy River. Guy Sebastian