Program aims to educate young consumers about mined stones’ positive qualities.
Ken MacNeill will exit Canada-based miner on December 31.
Ring featuring 3.42 carats of pink, red and blue diamonds from the mine priced at $3.8M.
Production up 43% year on year following mine takeover.
Revenue and profit from Rio Tinto’s diamond division soared in the first half of the year as demand strengthened and manufacturers replenished inventory.
Rahul Jauhari joined the Hong Kong-based company on July 1.
Australian mining giant put Canadian project on hold until end of year.