Ironwood is a magical substance created by druids from normal
wood. While remaining natural wood in almost every way, ironwood
is as strong, heavy, and resistant to fire as steel. Spells that
affect metal or iron (such as heat metal) do not function on
ironwood. Spells that affect wood (such as wood shape) do affect
ironwood, although ironwood does not burn. Using this spell with
wood shape or a wood-related Craft check, the character can
fashion wooden items that function as steel items. Thus, wooden
plate armor and wooden swords can be created that are as durable
as their normal, steel counterparts. These items are freely
usable by druids.
Further, if the character made only half as much ironwood as
the spell would normally allow, any weapon, shield, or suit of
armor so transmuted is treated as a +1 magic item.