** Shares of Black Bear Minerals BKB.AX rise as much as 6.9% to A$0.64, posting their biggest intraday pct gain since early October

** Stock hits highest level since November 18

** Speciality miner says sampling results show high-grade silver mineralisation at its Shafter project in Texas, U.S.

** Says results also flag multi-commodity potential including zinc, lead and gold

** More than 1.4 million shares change hands, 2 times the 30-day average

** Stock flat YTD, including the day's moves

(Reporting by Nikita Maria Jino in Bengaluru)

((Nikita.Jino@thomsonreuters.com;))