Thankfully, Hayden was able to get some information about the Painite's Eye. It was indeed a rare gemstone that could help Aura Users with the flow of their Aura.
After all, imbuing Aura in various weapons or pieces of equipment wouldn't be so easy.
If the quality of his weapon was low or it wasn't suited for Aura Users, the flow of mana imbued in that sword would probably be just around 50% of your original Aura or even lower than that. It could even break if you're not careful.
On the other hand, if you're using a higher quality item that suits well for Aura Users, it could reach up to 90%.
However, despite all that, just possessing a Painite's Eye would improve the wearer's conductivity by about twenty percent.
That means that even if you only use normal items, you won't have issues with your Aura Flow. It also means that even a knife made of paper could be a lethal weapon in the hands of Aura Users.