** Shares of critical minerals company IGO IGO.AX fall 2.5% to A$5.02, on track for their biggest fall since Dec. 19, if losses hold

** Stock fell as much as 3.5% earlier in the day hitting lowest level since Jan. 15

** Company's Q2 underlying EBITDA loss widens to A$79.0 mln($49.25 mln) from a loss of A$2.9 mln in Q1

** Company reports an 8% drop in quarterly revenue and a 3% fall in spodumene production from the previous quarter

** Stock up about 8% this year, as of last close

($1 = 1.6041 Australian dollars)

(Reporting by John Biju in Bengaluru)

((John.Biju@thomsonreuters.com;))