When a dose is consumed, each ore mined has a 10% chance of finding a stone spirit, which will automatically smelts some of the ores you mine, leaving the bar of metal in your inventory and giving you the smithing experience you would have gained from smelting it. The flask is made by blowing robust glass, requiring 89 Crafting and giving 100 experience. Red sandstone can be mined at Oo'glog and smelted using the Robust glass machine also located at Oo'glog.