** Shares of Australia's OD6 Metals OD6.AX jump 70.4% to A$0.092, on track for their best day since mid-August 2025
** Stock hits highest since December 9
** Rare earths and copper miner enters into an exclusive option agreement to buy high-grade, district scale fluorspar projects in Nevada, US
** Co says fluorspar's status as a designated U.S. critical mineral makes the acquisition a compelling opportunity given the United States' import reliance and prioritization of greater domestic production
** OD6 up 8.2% YTD
($1 = 1.4178 Australian dollars)
(Reporting by Shruti Agarwal in Bengaluru)
((Shruti.Agarwal@thomsonreuters.com))