** Shares of Future Battery Minerals FBM.AX rise as much as 83.3% to A$0.044, marking their biggest intraday pct gain ever
** Mineral explorer hits its highest level since May 31, 2024
** Co finds high-grade gold at the Miriam project in Coolgardie region of Western Australia
** About 20.6 mln shares change hands in stock's busiest day since November 2022, 37.6x the 30-day average
** Stock has almost doubled in value so far this year
(Reporting by Ananya Verma in Bengaluru)
((ananya.verma@thomsonreuters.com;))