** St George Mining SGQ.AX jumps as much as 9.1% to A$0.12, highest since October 27
** Co finds high-grade niobium at its Araxá rare earths and niobium project in Minas Gerais, Brazil
** Says discovery could potentially support significant expansion of project mineral resource estimate volumes
** Niobium is a critical metal with applications in steel production, batteries, electronics and aerospace industries, among others
** SGQ surged 296% in 2025
(Reporting by John Biju in Bengaluru)
((John.Biju@thomsonreuters.com;))