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Texture of Knappable stone
mullet:
Freeze Thaw isn't a problem down here ;D.
JoJoDapyro:
I decided to just do it. The red and orange stone looked to be good, so I decided to put some work in. Couldn't spall it with my bopper, Couldn't spall it with a 16 oz hammer. So I decided to pull out the stops. 12 pound sledge hammer. Tried to give it some taps, no dice. Tried to hit it a bit harder, still nothing. Golf swing with the 12 pound sledge seems to be the method. It is all spalled now, some decent sized ones, some small ones. The color is AMAZING. Here is a small one that shows the color change. Red, green orange, makes it look like gasoline on water. Now, Should I heat treat these spalls? It is HARD!
It is wet again. Not as smooth as I had hoped. But it rings for sure.
mullet:
Kinda looks like a form of calcite flow.
JackCrafty:
Just try some heat and see. Most guys use a turkey roaster but you can bury it under a fire like you mentioned.
I have no idea what those rock types are but they sure look like rhyolite (the dark stuff) and quartzite (the mutli-colored stuff).
mullet:
Yea, have to agree with Patrick, mineral colored quartzite, heat will not help it if it is.
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