Cerium concentrate, a low-grade material obtained at an early stage in refining ceria from raw ore, was employed as a support for model Pd catalysts, Both the support and the catalysts were characterized by a combination of techniques including oxygen storage measurements. Results are compared with those from similar catalysts made with pure ceria. The cerium concentrate is generally inferior to pure ceria as a support material and oxygen storage component. However, its effectiveness is greater than that of an inactive support, and thus it could be suitable for certain applications.