"Despite much reported evidence of the use of zeolitic (ic) chemistry in the ancient technologies, its promising future in the modern cast-stone technology and as innovative building materials for sustainable development, there is no evidence of use of geopolymeric cement in the pyramid stones. Based on unassailable field evidence in favor of a geologic origin for the pyramid stones, and equally convincing results of the present laboratory studies confirming the "geologic" origin of the casing stone samples from the Great Pyramid of Khufu (originally used as evidence for a man-made origin), ...the Egyptian pyramids stand as testament to the unprecedented accuracy, craftsmanship, and engineering skills of the Old Kingdom (2500 BC) stone masons!"
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"The Great Pyramid Debate" Dipayan Jana, Proceedings of the Twenty-ninth Conference on Cement Microscopy, Quebec City, PQ, Canada (May 20-24, 2007) p. 209.
https://en.wikiquote.org/wiki/Joseph_Davidovits
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Joseph Davidovits
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