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Heat treated Quartzite!

Howdy, wanted to share yesterday's work of some quartzite I spalled and threw some in the fire pit I had going last night.  Some of it changed dramatically, some in color, others sound more glassy....

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Re: Heat treated Quartzite!

Russ,First, excellent knapping.  I have been playing with heat treating quartzite over the summer.  Most Sundays, given a chance, I burn some oak down to coals and cook dinner over the fire, so it was...

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Re: Heat treated Quartzite!

Maybe the weekend of October 3 we try this

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Re: Heat treated Quartzite!

I've been meaning to give this a try also. As Jack C. Told me to only cook it for about a hour then work the biface and recook after the heated surface is removed. I feel as it thins less time will be...

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Re: Heat treated Quartzite!

That perk looks like a jasper perk. A cool coincidence must be a good saturation of iron's in the quartzite. I noticed something like that with my fire pit but the stones are on the edge. So it would...

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Re: Heat treated Quartzite!

Very nice work and results. That is some nice looking Q. Thanks for posting, I am itching to try some quartzite.Alan

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Re: Heat treated Quartzite!

Thanks for the replies!  Keith nice work and nice color Q...As Johnson was saying I did put a bunch on top of the stones on my fire pit and a bunch right on the coals before I went in...it seems the...

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Re: Heat treated Quartzite!

Good job Russ and Keith, both in the cooking and reduction. Very nice color change, it would be worthwhile to see what kind of results come from more structured experiments. Edit:  Glenn, did you ever...

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Re: Heat treated Quartzite!

I agree the matter calls for a more organized approach.  What I have done so far is rather haphazzard "tinkering".  Pete:  If you want to try it, knap a few spalls enough to get a feel for how they...

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Re: Heat treated Quartzite!

Don't know about Callahan on heating quartzite but Jack certainly has. Don't know if he's written up any formal experiments on it though (but in discussion the information comes pouring out in...

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Re: Heat treated Quartzite!

I agree Cresson has most likely done the most on this subject. Steve I have not have time set aside to give fire spalling a try but it's going to happen at so point. Hope before I see Jack again soon.

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Re: Heat treated Quartzite!

Thanks for replies and for all the info.  Two things I've learned and in my experience in applying the knowledge in working quartzite, my belief on the use of heat and edge battering (for me) improves...

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Re: Heat treated Quartzite!

I found some rock that looks like quartzite. It came from area that burned out from the wild fire we had here last year. The rock was colored pink from the retardant that was dropped on the area. I...

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Re: Heat treated Quartzite!

i thought quartzite could not be cooked...MAN,i was wrong...great thread..

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Re: Heat treated Quartzite!

Thanks for replies... I've only heated quartzite a couple of times and I do notice that the spalls change in a few different ways. No.1 obvious the color change in some, especially the ones with red...

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