** Shares of Australian Strategic Materials ASM.AX rise as much as 8.4% to A$1.735, their highest level since March 3
** Stock logs biggest intraday pct gain since April 1
** Critical minerals producer receives approval from Foreign Investment Review Board (FIRB) for acquisition by EFR Critical Minerals Pty Ltd, a unit of Energy Fuels UUUU.A
** In Jan, Energy Fuels said it would acquire ASM in a deal valuing the Australian firm's equity at A$447 mln ($319.47 million)
** ASM up more than 100% YTD
($1 = 1.3992 Australian dollars)
(Reporting by Aamir Sheik Khalid in Bengaluru)
((Aamir.SheikKhalid@thomsonreuters.com))