The pyramids stones are man-made (synthetic, artificial)
Cast in molds

The Pyramids at Giza have more than 5 million blocks of limestone, until now believed to be CARVED stones, new evidences shows they were CAST with agglomerated limestone concrete.
The website reveals how Ancient Egyptians built the pyramids using man-made stones, which look exactly like natural rocks.
The limestone blocks were cast in situ, employing an advanced technology that was later lost, leaving a puzzle hidden for thousands of years inside the pyramid stones. This theory undoubtedly shed an amazing new light on what really happened in Egypt in that remote era.
The scientific background, including analysis, formula, stone making, are disclosed in the recently updated book by Prof. Joseph Davidovits Geopolymer Chemistry & Applications, in several chapters, i.e. Chapters 5, 11, 13, 17 and 20.
Chancellor and Architect of Pharaoh Djoser:

Imhotep making a stone
HIGH PRIEST IMHOTEP INVENTED THE CHEMICAL FORMULA 5000 YEARS AGO.
Designer and builder of the FIRST PYRAMID in history, the Step Pyramid at Sakkara…
A French Scientist Solved the Pyramid Enigma:

Prof. Davidovits examining limestone blocks
Prof. JOSEPH DAVIDOVITS , scientist, REDISCOVERS ANCIENT EGYPTIAN ARI-KAT TECHNOLOGY.
A twelve-tonne replica of a pyramid limestone block was cast at the GEOPOLYMER INSTITUTE in Saint Quentin, France.
In this section: CG pictures, some pictures and texts after Relevant Television.