** Shares of Australia's Red Mountain Mining RMX.AX rise as much as 46.7% to A$0.022, their highest level since March 13, 2024
** Diversified miner acquires Yellow Pine Antimony Project, located in Idaho, U.S.
** Says project contains all necessary elements for the formation of economic gold-antimony mineralisation
** Stock logs biggest intraday pct gain since Sept. 11, up for a third straight session
** About 20 mln shares change hands, 2.2 times the 30-day avg
** Stock up 66.7%, YTD
(Reporting by Anjali Singh in Bengaluru)
((anjali.singh2@thomsonreuters.com;))