I am not sure what these smooth, polished finish bookends are made of – could be onyx or marble stone, or possibly glass made to mimic the color variations of onyx. These beautiful bookends complement both traditional and modern decor. Made to look like Aztec Mayan tiki carvings. Perfect for office, study, or living room. 4” high X 2” wide. Heavy weight provides excellent book support. No chips, cracks, or repairs. $10 for the set.