** Shares of Sierra Rutile SRX.AX soar as much as 15.6% to
A$0.185, hitting their highest since mid-October
** The natural rutile producer says it has received an
unsolicited bid from oil marketing company Leonoil for an
off-market takeover of all shares it does not own
** Leonoil currently holds a 19.85% stake in SRX
** Offer price of A$0.18 per share, a 12.5% upside to
stock's last close
** Stock has risen ~66.7% this year, as of last close
($1 = 1.4778 Australian dollars)
(Reporting by Archishma Iyer)
((Archishma.Iyer@thomsonreuters.com;))