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texas flint

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S.C. hunter:
Hey guys,
  I purchased a box of flint, it's been several years ago.  I got out a chunk, and was going to try and knock off something to knap. This stuff is so hard, I cant hardly break it even with a steel hammer. just break off small pieces.
 Is there anything that can be done to soften this up? Or make it flake?

   Thanks
    Steve

Zuma:
How about some pictures. Many TX cherts can be heat treated. :-K :-K
Zuma

S.C. hunter:
Zuma,
  This is still just rocks right now, can I heat treat them? I was thinking you broke up larger rocks, and treated the smaller pieces?
   Steve

JEB:
Sounds you have some river cobble that is used  in the landscape industry and yes some of that stuff is as hard as steel. Heat may tame it.  When we go there in March I don't mess with that stuff. 

bjrogg:
Jeb or Zuma, I was always wondering the same thing S. C. Hunter asked.  Can you cook large stones? I thought I read somewhere not to cook anything of inch thick.
Bjrogg

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