** Shares of Australia's GreenTech Metals GRE.AX post a
near fourfold jump to A$0.405, eyeing their best day ever
** The lithium explorer confirms presence of high-grade
spodumene-bearing pegmatites at its Ruth Well project in Western
Australia's Pilbara region
** Stock hits highest since June 17
** Co says results from 22 reconnaissance rock chip samples
returned "encouraging" grades of lithium mineralisation,
measuring up to 1.65% lithium oxide
** Adds, it entered a services agreement with lithium
exploration and development team Obsidian Metals Group (OMG) to
fast-track its WA lithium exploration strategy
** Stock down 25% this year, as of last close
(Reporting by Riya Sharma in Bengaluru)
((Riya.Sharma@thomsonreuters.com;))