Thanks Art. I live in Texas so it's Texas Hill Country flint stone which is pretty easy to find.

Knapping the general shape of the knife was relatively easy and took a couple of days. I made a pattern blade out of card board so I could compare it to the stone I was shaping. The detailed work like making the thickness of the knife as uniform as possible and then creating the edge of the blade took about a month. That's where it gets tough and where a flint knife typically breaks as the edge is made up of individual chips in the stone to make a serrated edge. This is the first knife I am happy with as all the other ones I have made up to this point have been pretty ugly.

I screwed up the handle though. The handle is the end of a Big Horn sheep horn and it was really weathered and about the same color as the stone so I stained the handle and binding to make the contrast look a little better between the handle and blade. Bad idea on my part as the stain is still sticky feeling 2-month later. Once I get the bug again I'll strip the stain and rebind it.