** Shares of lithium explorer Riversgold RGL.AX climb as
much as 18.2% to A$0.039, their best day since May 18, if gains
hold
** Riversgold says it has discovered up to 3.14% lithium
oxide at surface at its Tambourah lithium project in Western
Australia urn:newsml:reuters.com:*:nASXbC97dX
** Stock hits highest since June 7
** Says lithium mineralization discovered to date represents
just a small part of the overall tenement potential, with
further exploration slated for the coming months
** Stock has more than doubled in value YTD as of last close
(Reporting by Riya Sharma in Bengaluru)
((Riya.Sharma@thomsonreuters.com;))