Rio Tinto (ASX, LON,: RIO) has unearthed a 158.20-carat gem-quality yellow diamond at its Diavik mine, located 200 km south of the Arctic Circle in Canada’s Northwest Territories. The precious ...

and the Summer choker with a fancy intense yellow cushion-cut diamond weighing over 9 carats Autumn has Grand Feu enamel and diamond-encrusted gold; while the more than 40-carat Winter tiara ...