Phew, that goes the voidy way instead of the infinite loop. But it is fixed now. ^^
Also a Sapphire Boule does not contain 4 Units of Alumina, its 4 Units of Sapphire. There is a big difference in the Ratio, because 5 Alumina = 6 Sapphire. This means the Recipe SHOULD have outputted 3 Boules instead of one.