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A: Pretty dang fast with the right material and skill.
http://www.youtube.com/watch?v=7XPEoiY3NnI
http://www.youtube.com/watch?v=7XPEoiY3NnI
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Not according to a fair number of knappers on other boards. There's still lots of argument over the precise mechanism at the microscopic or molecular lever, but it seems to be generally related to dehydration. In surface finds, even from beaches, fractures don't travel as far or as easily as in reasonably-fresh-dug stone from well underground. Some folks have kept fresh-dug rock in water until they can get to working it. Heat-treating is a completely separate mechanism to improve workability, and seems to be related to fine-scale recrystallization and maybe stress-relief.ChrisPer said:Thats just talking bollocks for the tourists.
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