** Shares of Ionic Rare Earths up 5.6% to A$0.0095, on track for their best day since Oct. 28, if current trends continue
** Non-gold precious metals miner says its joint venture, Viridion, signs MOU with SENAI FEIMG Innovation and Technology Centre to establish Brazilian magnet supply chain
** Under agreement, parties to jointly develop and produce rare earth magnets
** Viridion is co's Brazilian JV with Viridis Mining and Minerals
** Stock down 63.5% YTD, including today's moves
(Reporting by Sherin Sunny in Bengaluru)
((Sherin.Sunny@thomsonreuters.com))