Condensed gold

High alchemy turns Condensed gold into 4,800,000 gp. Buying one at 10,545,049 gp (its guide price, as it has not traded today) and casting with a nature rune at 138 gp costs 10,545,187 gp. That is a loss of 5,745,187 gp per cast at its guide price, so it is not worth alching for profit right now.