They may be cubical, spherical, cuboidal, or other shapes. It has cubical or octahedral symmetry. It consists of an outer cubical shell (the "sarcophagus") and the inner cube. It grows in tetrads, irregular clusters, and cubical packets of eight. Simplicial meshes tend to be easier than cubical meshes. It is found in tetrads, irregular clusters, and cubical packets of eight. The unit is fixed in front of a toilet on the cubical ["sic"] wall. The cubical bone is lightweight due to a spongy construction. It was covered in scales that were cubical in shape. These are often small cubical pieces, often brightly colored. There is extensive presence of Harappan seals and cubical weight measures in Mesopotamian urban sites. Cubical blocks of the warehouse on a high platform are also visible. Cubical gaming dice in China have been dated back as early as 600 B.C. Consider the canonical cubical (six-sided) die. The theory of a light-collecting cubical box was described by W. E. Sumpner in 1910.