Where did the stones used for pyramids come from

Limestone was the predominant material quarried close to the pyramid site. Granite was also used, this came from Aswan some 400 miles upriver. The fine shiny white limestone used for the outer casing came from Tura located on the East bank of the Nile. Most of the Tura limestone has now disappeared and limestone core blocks are now visible. The Islamic builders of Medieval Cairo having no respect for the pagan ancient Egyptians robbed the pyramid of its outer case in order to build the city.