Once found, the stone spirit will send all ores mined directly to the bank for 30 seconds, including extra ores obtained with the Varrock armour and bonus ores gathered from concentrated coal and gold rocks. The potion also gives a small chance of receiving higher level ore (also sent directly to your bank). It will also boost your mining xp by 10% while banking ore. Each dose of potion lasts for six minutes. A message will warn you one minute before the timer runs out. More than one spirit may be acquired during the six minutes after each dose.