RE: Giza pyramids
November 11, 2011 at 5:36 pm
(This post was last modified: November 11, 2011 at 5:45 pm by Minimalist.)
Oh the Mohs scale, granite, which is mainly quartz has a rating of 7 while copper is about a 3.
Calcite ( limestone ) is also about 3
http://mexicogemstones.com/glossary2.htm
There is also an Absolute Hardness scale referenced here which suggests that quartz is much harder than calcite/copper.
What it means is that even using copper tools on limestone they would have been constantly sharpening them...another class of skilled workers for the project, btw.
http://www.pbs.org/wgbh/nova/pyramid/exp...tory2.html
Calcite ( limestone ) is also about 3
http://mexicogemstones.com/glossary2.htm
There is also an Absolute Hardness scale referenced here which suggests that quartz is much harder than calcite/copper.
What it means is that even using copper tools on limestone they would have been constantly sharpening them...another class of skilled workers for the project, btw.
http://www.pbs.org/wgbh/nova/pyramid/exp...tory2.html
Quote:The foundations of the pyramids were laid with limestone blocks mined by masons using copper chisels.
