Then next rock object, is this Skirt Dress rock. Also for this one counts, named by EA this way. I think it's just a rock. :)
This rock comes with 8 small deco slots. The deco slots placed on the edges of the rock can probably only be used by birds as all other objects will balance on the edge, like my animated iguanas. No pathing changed around this one either, so placing plants around it will probably look more realistic when Sims walk around the object.