Sasune
I remember reading in the ATA from this week that this girl spent millions attempting to craft Aurora Kitten Star, but when I failed a few times make Orb Aggregates I didn't lose any gold when I failed.
There is an occasional bug with Orb Aggregates where the item doesn't get made but without being an "official" fail, where it doesn't show the pop-up picture of the two alchemist chibis after an explosion. If you don't see the pop-up, you don't lose gold.
It seems to happen when attempting a lot of Orb Aggregates in a row.