<https://forum.davidicke.com/index.php?/topic/16226-the-great-pyramids-of-giza-are-made-of-concrete/#comment-227644>
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"The large blocks that form the central chambers and the vibratory shaft that leads upwards off them are made of granite\n \n\n\n\t \n \n\n\n\tSo why would you try to come up with a theory about how they created limestone blocks which are comparitively easy to cut using chisels and axes which then fails to look at the large granite blocks that have been cut with such precision?\n \n\n\n\t \n \n\n\n\twhatever they were doing they were cutting the hardest stone type with incredible precision. In comparison cutting limestone is a cinch\n \n\n\n\t \n \n\n\n\tDon't worry yourself over how they formed limestone buliding blocks....worry yourself how they worked and manouvered large blocks of granite\n \n"
<https://forum.davidicke.com/index.php?/topic/16226-the-great-pyramids-of-giza-are-made-of-concrete/&tab=comments#comment-214760>