** Shares of Pivotal Metals PVT.AX rise as much as 25% to A$0.010, their biggest intraday gain since Nov 8

** The miner says it achieved up to 90% copper recovery at Horden lake in Quebec

** Additional byproduct recoveries expected in nickel concentrate - co

** Stock hits highest since Nov 25

** PVT stock down 60%, YTD

(Reporting by Adwitiya Srivastava in Bengaluru)

((Adwitiya.Srivastava@thomsonreuters.com;))