** Shares of Australia's Metallium MTM.AX fall 7.3% to A$0.64, hitting their lowest level since August 21

** Critical and precious metals extractor posts a bigger half year net loss attributable of A$24.6 million ($17.25 million), compared with a A$3.3 mln loss a year earlier

** Stock set for worst trading session since February 5

** YTD, shares down 39.9%

($1 = 1.4257 Australian dollars)

(Reporting by Shruti Agarwal in Bengaluru)

((Shruti.Agarwal@thomsonreuters.com ))