** Shares of IRIS Metals IR1.AX rise as much as 21.7% to
A$0.590, their highest level since March 11
** Stock on track for best day since March 4, if gains hold
** The diversified miner says significant lithium ores
discovered at offshore project in South Dakota
** Co adds potential for further lithium mineralization
towards southern portion of project
** Stock top gainer in the ASX All Ordinaries index .AORD
** Stock has fallen 47.6% this year, as of last close
(Reporting by Shivangi Lahiri in Bengaluru)
((shivangi.lahiri@thomsonreuters.com))