Perth-based nickel and cobalt exploration company Minara Resources Ltd late yesterday posted a half-year net profit of $100.7 million, a 610 per cent increase on the $16.5 million earned the same time last year.

Perth-based nickel and cobalt exploration company Minara Resources Ltd late yesterday posted a half-year net profit of $100.7 million, a 610 per cent increase on the $16.5 million earned the same time last year.