Pirra Lithium, one of Australia’s newest lithium explorers, has started drilling at its Spear Hill project in WA’s Pilbara Craton region, testing a 1.2km stretch of outcropping lithium pegmatites where rock chips previously returned assays grading up to 2.34 per cent lithium oxide. Pirra is a 50-50 JV between Calidus Resources and Haoma Mining.