Acacia Mining was trading higher as Credit Suisse initiated the stock with an 'outperform' rating, despite the gold miner reporting an 18% fall in its first-quarter core profit due to declining prices for the yellow metal.Mining peers Vedanta Resources, BlackRock World Mining Trust and Kaz Minerals were also making solid gains, tracking improving metal prices, lower oil inventories and expectations of a Chinese stimulus.Flow control group Rotork was in the red after announcing that order intake had declined in the first quarter of 2015, as challenging conditions in the oil and gas markets persisted.Legoland and London Eye owner Merlin Entertainments dipped after JPMorgan Cazenove downgraded its rating for the theme parks group to neutral, a disappointing end to the stock's first month in the blue chip index.Pace reversed from Thursday's gains, which were a result of an agreement to be taken over by US telecommunications equipment manufacturer Arris in a $2.1bn deal. RisersKaz Minerals (KAZ) 253.00p +7.84%Acacia Mining (ACA) 294.00p +4.81%Cable & Wireless Communications (CWC) 69.75p +4.65%Vedanta Resources (VED) 637.00p +4.43%Diploma (DPLM) 820.00p +3.99%Just Retirement Group (JRG) 175.00p +3.73%Laird (LRD) 359.90p +2.98%Greencore Group (GNC) 350.80p +2.93%Ocado Group (OCDO) 342.70p +2.67%BlackRock World Mining Trust (BRWM) 311.00p +2.47%FallersPetra Diamonds Ltd.(DI) (PDL) 161.10p -3.99%Hunting (HTG) 583.50p -3.07%Bank of Georgia Holdings (BGEO) 1,903.00p -2.81%Rotork (ROR) 2,369.00p -2.51%Man Group (EMG) 208.60p -2.16%Pace (PIC) 437.40p -2.15%Crest Nicholson Holdings (CRST) 449.60p -2.07%Telecom Plus (TEP) 809.00p -1.94%Beazley (BEZ) 281.60p -1.92%Petrofac Ltd. (PFC) 872.00p -1.86%