Edward C. Moore Collection, Bequest of Edward C. Moore, 1891
Not on view
Translucent deep purple, appearing black, and opaque white. Fragment of thick, flat block. Pattern of concentric wavy lines in white on purple ground. Polished upper surface; some pitting of surface bubbles on upper surface; deep pitting, dulling, brilliant iridescence, and patches of thick creamy weathering on underside and edges. Probably used as decoration in wall or ceiling revetment.