The move comes after the company completed a bulk screening program which began in July 2014.

GPNE screened 500 tons of graphitic rock from its tailing heaps and calculated a preliminary lump-to-waste ratio of 1:3.

The screening results, ratios of lump yield, and planned increases in daily screening yields will be used to define GPNE’s plans for its future processing plant.

The company said in a statement: "During ‘Part 1’ of Bulk Testing, GPNE will prepare samples from 500 tons of stockpiled, finely screened graphitic rock and samples from 100 tons of graphitic lumps.

"The samples of both yields will be sent for laboratory testing and grading at Gecko Laboratories in Namibia and SGS Lakefield’s facilities in Canada."

Results from ‘Part 1’ and ‘Part 2’ of bulk testing phase will confirm the grade and size of natural, flake graphite at the property.