** Shares of Rarex Ltd REE.AX rise as much as 12.7% to
A$0.089 - set for best session since April 11, if gains hold
** Rare earths explorer says it has doubled reserve estimate
for known mineralisation at depth within its Cummins Range
project in Western Australia urn:newsml:reuters.com:*:nASM000D4C
** Says co began a drilling programme last month, with one
hole extending mineralisation 250 metres down-dip and doubling
the mineralised zone to at least 500 metres
** Stock hits its highest since May 9; down 20.2% YTD, as of
last close
(Reporting by Riya Sharma in Bengaluru)
((Riya.Sharma@thomsonreuters.com;))