Dense earthen root
The official GemStone IV encyclopedia.
To forage for it, use the term earthen root.
The earthen root is edible, although this is not necessarily recommended:
>eat my root >You take a bite of the earthen root. It has an unpleasant earthy flavor with the definite aftertaste of dirt. It takes you a few seconds to choke it down. >You have about 9 bites left. >Roundtime: 5 sec.