I noted a posting on the home page asking about sunstones and i would like to add that sundtones can be havested from evil magma peas and the mestrome snapdragon.
I have havested quit few from these seeds a word of advice in genral you should plant at least 12 of these in a patch to get at lest 2 sunstones as they are not a garanteed drop.
Both these seeds give exelent hard to get regents as well as tresure cards however a word of warning they are quite expensive melstrom snapdragon can only be purchased in wintertusk and are about 3600 gold each and evil magma peas are available from the crown shop.