When activated during fishing, there appears the message Your furnace perk consumes a fish and gives you extra XP. When activated during mining/woodcutting, there appears the message Your furnace perk consumes some ore/wood and gives you extra XP. For crystal fragment, crystal urchin fishing and gem stone, crablet mining, this message is: Your furnace perk consumes some of what you gather and gives you extra XP. * Crystal-flecked sandstone * Mutated root * Pure essence * Ingots Items consumed by the perk do not count towards a Daily challenge.