Diamond and Gemstone Mining

Rio to invest $833m to ramp up underground block cave project at Argyle Diamond Mine

Rio Tinto will invest $833 million to ramp up the underground block cave project at its Argyle Diamond Mine in Western Australia.

Leighton Contractors JV secures major Pacific Highway Sapphire to Woolgoolga Upgrade

Leighton Contractors and its joint venture partner Fulton Hogan have been selected by the NSW Roads and Traffic Authority (RTA) as the preferred proponent for the design and construct contract to deliver the $698 million Pacific Highway Sapphire to Woolgoolga Upgrade project.