** Shares of Australia's Lynas Rare Earths LYC.AX rise as much as 13.8% to A$14.97, their highest since December 3
** Stock posts largest intraday pct gain since mid-July, placing it among top gainers on the broader benchmark .AXJO, which is up 0.4% as of 0341 GMT
** China on Tuesday banned exports of dual-use items, including certain rare earth elements essential for making drones and chips, to Japan
** Dual-use items are goods with both civilian and military applications
** Japan has been a key market for Lynas for more than a decade; Japanese conglomerate Sojitz 2768.T in 2011 signed a sales deal for light rare earths
** In October, Sojitz began importing heavy rare earths
** Around 9.1 million shares change hands, close to the 30-day average volume
** Stock surged 93.5% last year
(Reporting by Nikita Maria Jino in Bengaluru)
((Nikita.Jino@thomsonreuters.com;))