Pukao are the hat-like structures or topknots formerly placed on top of some moai statues on Easter Island. They were all carved from a very light-red volcanic scoria, which was quarried from a single
Re-erected tuff moai at Ahu Tahai with restored scoria pukao and replica coral eyes.
Rano Raraku is a volcanic crater formed of consolidated volcanic ash, or tuff, and located on the lower slopes of Terevaka in the Rapa Nui National Park on Easter Island in Chile. It was a quarry for
Outer slopes of Rano Raraku with many moai, some half-buried, some left still "under construction" near the mountain.