looks more like some sort of mineral crystalization growing out of it..
i'd suggest blending the ice in a way so that it seems as if it is lightly coating the surface of the pumpkin, or looks like it has melted over the face but froze again in the process.. cuz at the moment, it seems seperate from the pumpkin, almost like hair or a jagged helmet..
good stuff so far, i'm liking the color.