** Shares of Variscan Mines VAR.AX rise 14.3% to A$0.008

** Stock set for biggest single-day pct rise since February 11 - if current gains hold

** Natural resources co says high-grade zinc was identified at the La Caseta zone of its San Jose mine in California

** About 1.4 mln shares change hands, 1.2 times the 30-day average of 1.2 mln shares

** Stock up 14.3% YTD, including current session's moves

(Reporting by Manasi Dasa in Bengaluru)

((Manasi.DasaSundeep@thomsonreuters.com;))