** Shares of Buxton Resources BUX.AX rise as much as 7% to A$0.046, their largest intraday pct gain since February 26

** Stock hits its highest level since March 2

** Diversified miner reports evidence of copper-gold system at its Centurion project in Western Australia

** Says drilling results validate project's potential to host a "province-defining discovery"

** Stock up 33.3% YTD, including the day's moves

(Reporting by Nikita Maria Jino in Bengaluru)

((Nikita.Jino@thomsonreuters.com;))