if you didn't already know this then here goes. Put any kind of identified charm in the cube with 3 Perfect Gems and you get another charm with random mods. For all you people out there that have a lot of useless p gems(p sapphire) get rid of them by using this recipe. Skill Gcs can be gotten this way. My first time trying it on a gc i got a pnb gc. So try your luck.