[Redfrog]

I just run a test. No matter what forge bonus you have, you must pay at least 1 gem per magic level required to forge the item(that is, 1 gem for every 5 gems the item originally cost). So even if you were a Nataraja with the Hammer of the Cyclops and the Hammer of the Forge Lord , you were still paying out 8 Astral Pearls to make a Ring of Sorcery.