Quartzite is a hard, compact type of sandstone found in several places in Egypt, particularly at Gebel Ahmar near Cairo. It is not used very often as a building material, but does appear in the pyramid temple of Teti at Saqqara (6th Dynasty) and in the burial chamber of the pyramid at Hawwara (12th Dynasty). On the other hand it was frequently used for statues and sarcophagi, for example a series of royal sarcophagi from the 18th Dynasty, including those of Hatshepsut and Tutankhamun (the square sarcophagus from his tomb in which the anthropoid coffins nested), are made from yellow-brown quartzite.