** Shares of Australia's Red Mountain Mining RMX.AX rise 15.2% to A$0.038, their biggest intraday pct gain since October 15
** The critical minerals and gold explorer identifies 250 antimony occurences at its Armidale Antimony-Gold project in New South Wales
** Red Mountain Mining confirms high-grade antimony-gold mineralisation at its Oaky Creek Project in New South Wales
** YTD, Red Mountain stock up 322.2%
(Reporting by Keshav Singh Chundawat in Bengaluru)
((Keshav.singhchundawat@thomsonreuters.com))