By Erika Winters
Rio Tinto has released limited edition pink-diamond ingots commemorating the Spring 2013 opening of the Argyle underground diamond mine. The one-ounce, 22k pink-gold ingots are each set with seven Argyle pink diamonds in the branches of a boab tree. The ancient boab tree is native to Western Australia's Kimberley region, where Argyle's pink diamonds were formed over a billion years ago.
“We are delighted to partner with the Perth Mint on the exclusive release of this distinctive investment piece. It is a beautiful symbol of the unique Argyle story and the recent milestone commencement of underground mining," said Kim Truter, managing director of the Argyle Diamond Mine.
