** Shares of BBX Minerals Ltd BBX.AX rise as much as
30.14% to A$0.095, their biggest intraday pct gain since Nov. 14
** Stock posts its highest since Nov. 15
** Minerals explorer conducts bioleaching test work of a
sample from a drill hole at the Tres Estados project in Brazil
** Says test showed a significant increase in precious
metals - gold, palladium, platinum, iridium and rhodium
** More than 862,000 shares change hands, vs 30-day average
volume of 313,000 shares
** Stock has fallen 52.9% this year, as of last close
(Reporting By Udbhav Krishna P in Bengaluru)
((UdbhavKrishna.P@Thomsonreuters.com))