Tolkowsky's calculations included neither a culet nor a girdle. They may or may not have a culet. The facet pattern features eight needle-like facets pointing outward from the culet (bottom) facet. Rumble has a line of jewellery called Culet, which he contributes to the design of. The culet (tip) is ground and polished to a hexadecagonal surface parallel to the table. The importance of a culet was also realised, and some table-cut stones may possess one. The culet is added largely to protect the integrity of the gemstone. Nonetheless, culet facets are common on modern brilliant-cut diamonds. The culet is the tiny point or facet at the bottom of the diamond. In gemology, a culet is a flat face on the bottom of a gemstone.