** Shares of Metallium MTM.AX fall 5.4% to A$0.87, their steepest one-day fall in more than two weeks

** The critical metals miner raises A$75 million ($50.48 million) at A$0.84

** Issue price is at a discount of 8.7% to stock's last close

** Stock up 309% in 2025

($1 = 1.4857 Australian dollars)

(Reporting by Jasmeen Ara Shaikh in Bengaluru)

((Jasmeenaraislam.Shaikh@thomsonreuters.com;))