** Shares of WA1 Resources WA1.AX rise as much as 21.5% to
A$19.7, their biggest intraday gain since Jan. 4
** Stock top gainer on the ASX All Ordinaries Index .AORD
** Diversified miner reports positive metallurgical test
results for niobium mineralisation at its West Arunta Project in
Western Australia
** Says results show high-grade niobium concentrate with low
impurities and industry comparable recovery rates can be
produced at project
** Stock hits its highest level since June 3
** About 442,000 shares change hands, compared with the
30-day average volume of around 372,000
** Stock up 56.7% YTD, including session's gains
(Reporting by Aaditya Govind Rao in Bengaluru)
((Aaditya.govindrao@thomsonreuters.com;))