** Shares of St George Mining SGQ.AX rise 13% to A$0.026, their highest levels since Oct 25

** Stock rose as much as 21.7% earlier in the day, set for its biggest intraday gain since Aug 12

** The diversified miner signed an agreement to potentially work together with Liaoning Fangda Group on the Araxa niobium project

** Co and Fangda to consider offtake agreement whereby Fangda may secure a minimum 20% of potential niobium products from the project

** Stock up 12% this year, including session's gains

(Reporting by Shivangi Lahiri in Bengaluru)

((shivangi.lahiri@thomsonreuters.com;))