srd
SRD
Periapt of Wisdom: Although it appears to be a normal pearl on a light chain, a periapt of wisdom actually increases the possessor’s Wisdom score in the form of an enhancement bonus of +2, +4, or +6 (depending on the individual item).
Moderate transmutation; CL 8th; Craft Wondrous Item, owl’s wisdom; Price 4,000 gp (+2), 16,000 gp (+4), 36,000 gp (+6).
Open Game Content from the System Reference Document 3.5, used under the Open Game License 1.0a.