** Green Critical Minerals GCM.AX jumps 16.7% to A$0.021; set for biggest intraday pct gain since Jan. 3
** Mineral explorer says initial testing of its pilot plant in New South Wales successfully produced 12 test samples of VHD graphite coins
** Adds results exceed industry benchmarks
** Around 78.2 mln shares traded, 2.4x the 30-day avg
** Stock rose as much as 19.4% earlier in the day
** GCM gained 40% in 2024
(Reporting by Manasi Dasa Sundeep in Bengaluru)
((Manasi.DasaSundeep@thomsonreuters.com;))