Talk with Lani the Troll with the pet rock in inventory to find out you need to make rock soup to get this during the Fremennik Trials Quest for Olaf the Bard's trial. Put a potato, onion, cabbage and the rock into his cauldron to make rock soup. Now talk to him again and he gives you the Golden Fleece. Lani the Troll is located just west of the Slayer dungeon at the end of the eastern mud path leading from Rellekka.
Uses
Spin the Golden Fleece into golden wool using any spinning wheel. The closest one to the quest area is Seer's Village, up the ladder southwest of the bank.
Notes
Lani will give you another one if you lose it or use it, just talk to him. You will have to pay 1000gp for one.
