Baja_Costero said: I'm not sure you will know for sure (or at least I would withhold judgment, given my limited experience) until you get a chance to see the flowers. It seems like maybe a hybrid to me, but the flowers on G. paraguayense are pretty distinctive, and you would recognize them when you saw them. White petals with delicate red spots on them.
Ghost Plant (Graptopetalum paraguayense)