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Texture of Knappable stone
cowboy:
Man, that is some course looking stuff! I picked up some around white sands new mexico that looks exactly like yours with the white cortex and black interior. It does flake but has layers in it, heat does absolutely nothing to it so I gave up on it.
Generally the chert down here: I like to get it a half inch or thinner, bury in sand "lucky you", pack the sand down and check it. Want it to be around 2 1/2 to 3 inches. start a fire while not disturbing the sand and keep piling it on all day - dark to dark. The bed of coals will continue cooking throughout the night a some of next day. Wait until the next day to dig them up. that stuff looks like it could take a lot more heat, don't know. maybe an inch deep? experiment with some pieces first and good luck...
JoJoDapyro:
OK, Maybe tomorrow I will see what I can do. I should be home from running around by noon. I have enough pallets to burn for about 2 days :laugh:. If not I just brought a half a truck load of pine back from the cabin. Spalling seems like it may be the hard part. This is all really tough stuff. My 1 1/2 copper bopper doesn't really phase it, I was thinking about running it through a tile saw to get some decent preforms.
It also seems to be heavier than other rocks its size, like I have read is a good sign. It does spall with a 16 oz hammer though.
mullet:
That stuff looks like gneiss, not sure about the spelling. Almost like shale, real tough to knap.
JackCrafty:
I don't think heat will do anything to that rock, as Cowboy said.
That stuff will knap, but you should work out for a few months before tackle it. ;D I used that type for rock for crude choppers in the past. It works for digging. If you can knock off a long flake and put a point on it, you might be able to use it as a stone pressure flaker.
JoJoDapyro:
What about the first stone? It does have a smooth texture. I don't think all of it is useable, but the red and orange band for sure. I wish the color would show. It is the same color as my truck.
Mullet, It is times like these that you do a facepalm. It is for sure just like Shale. It is near the Kennecott copper mine, but I don't think it is from there. There appears to be 500 + pound boulders of Chert, but it wont break, at least not with the 16 oz hammer I took.
Another thought. Do any of the Knappers on here have to deal with stone being exposed to freeze thaw? I hear it is death on stone sometimes.
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