** Shares of Mount Ridley Mines Ltd MRD.AX rise as much as
33.3% to A$0.0040, their highest level since May 2
** Miner finds high-grade rare earth elements and
geophysical anomalies at Mia Prospect in co's Mount Ridley
project in Western Australia
** Co sees biggest intraday jump since May 3
** About 38.0 mln shares change hand compared to 30-day
average trading volume of 8.6 mln shares
** Stock down 30% YTD, as of last close
(Reporting by John Biju in Bengaluru)
((John.Biju@thomsonreuters.com;))