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Crackin the stone a lil

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Knapper:
So did he cook that black rock?! It looks great. And if he did and it works that much better, why do I  hear people say " you cant cook black rock"? I have some black novaculite just sitting around, would love to know the recipe.
Knapper   

Tower:
Thank y'all for the compliments Gents.
Knapper,  John  only heated the spall. The stone itself is still untreated.   I know John used a kiln to heat it, my roaster only gets up to 500*. 
Black or not, it took heat well.

flungonin:
Awesome work, beautiful points

crooketarrow:
  SWEETTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT

iowabow:
I can pm folks the recipe but knapper it was a 5 day cook in a programable controller to step up and down.
Tower I am soooooooo happy to see that you produced a point from that stone and to top it off an amazingly beautiful one to boot. You are an amazing talent!!!

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