• Shares of gold miner St Barbara rise as much as 20.6% to A$0.880, highest level since March 3

• Shares post biggest intraday pct gain since Jan 21

• Co agrees to sell remaining interest in New Simberi Gold Project to Lingbao Gold

• Consideration includes A$410 million ($296.06 million) in cash

• YTD, SBM shares up 47.4%

($1 = 1.3848 Australian dollars)

(Reporting by Nichiket Sunil in Bengaluru)