Main Discussion Area > Flintknapping
Box of rocks trade update...
criverkat:
that's some sweet looking material and nice point to boot
knapperhead:
Sweet points.....that should keep you busy for a while
JackCrafty:
Worked some of that Basalt. It was kinda hard maintaining length on the workpieces, there are pockets of ash or crystals that are very weak. I snap off the tips or bases easily when getting down to the thinning stage. Hard to run long flakes too. Sometimes has layers that can cause whole areas to split off. Overall, though, this Basalt is the nicest Basalt I've every worked. It can be made very thin and with very sharp edges.
Also an update on some of the other material. I will not be working on these three little piles of rock. I will. however, work on the rest of it and post more updates...
Bryce:
So basalt is knappable! I'm not sure if our Columbia basalt is the same. Does it need to be treated?
Majuba Tom:
It is great you were able to get some good points out of the basalt. It just go's to show a relative new knapper like myself what experience can achieve with the same stone that I struggle with.
--- Quote from: Bryce (Pinecone) on January 13, 2014, 02:15:11 am ---So basalt is knappable! I'm not sure if our Columbia basalt is the same. Does it need to be treated?
--- End quote ---
I have tried heat treating to 600 deg with no effect. Some day I will try some at 1000 deg. All the heat treating charts I found on line had no reference temps for basalt. Maybe someone knows for sure if heat treating works?
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