The third RC competition was organized by Dipo Omotoso, winner of the second Reynolds Cup competition, with funding from Natural Resources Canada. Results of the contest were announced at the 2006 CMS/GFA annual meeting in Oleron, France. The winner of the contest was Douglas McCarty of Chevron, Texas, followed by Stephen Hillier of the Macaulay Institute, Scotland and Reinhard Kleeberg of TU Bergakademie, Freiberg, Germany. Details of the quantitative methods used by the top three finishers were published in the December 2006 edition of Clays and Clay Minerals. In addition to the commemorative plaques and trophy awarded to the top-placed finishers, the champion received $1000 towards travel expenses. Diffraction patterns and chemical composition of mineral standards used to prepare the 2006 contest samples may be obtained from Dipo Omotoso (email@example.com).