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can cooking hornstone improve knappability?

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beartail:
I have some hornstone slabs and was wondering if cooking it would help it be a little easyer to work.what temp would ya use?

caveman2533:
nope, it will likely destroy it. you could try some at a low temp but it will likely kill it.  As a general rule of thumb blues and blacks can not be heated novaculite is one exception.

Hopewell point:
Like Caveman said, it will blow up. It doesn't need it anyways.

TRACY:
I've experimented heating some of the low grade grainy hornstone with no improvement. If it doesn't knap well then it isn't good hornstone. It flakes real easy. Caveman summed it up.

Tracy

Zuma:
Ditto  :)
Zuma

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