** Shares of Tambourah Metals TMB.AX rise as much as 19.2% to A$0.062, hitting their highest level since Dec. 11
** Stock marks its biggest intraday pct gain since Nov. 10
** Metal explorer says drilling at its gold project in Western Australia has identified high-grade gold
** Stock gained about 140% in 2025
(Reporting by Rajasik Mukherjee in Bengaluru)
((Rajasik.Mukherjee@thomsonreuters.com))