** Shares of Hastings Technology Metals HAS.AX rise 6.3% to A$0.34, set for their strongest trading session since April 17, if gains sustain
** The rare-earths developer executes definitive agreement with Australian billionaire Andrew Forrest's Wyloo first announced in February
** Hastings to sell 60% interest in Yangibana rare-earths and niobium project in Western Australia to Wyloo
** As one of the most advanced rare-earths projects in the world, Yangibana will be able to produce concentrate within 18 months from a final investment decision - Wyloo CEO
** Stock marginally down 1.5% YTD, including current session's moves
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))