C-complex asteroids frequently exhibit reflectance spectra consistent with thermally metamor-phosed or shocked carbonaceous chondrites, and brecciation, including Ryugu, and Bennu. Petrographic evidence of brecciation has been presented for CM, and here we reexamine Cold Bokkeveld, one of the most diverse CM breccias, as a preview of the samples to be returned from Ryugu and Bennu.