yeahhhh no holes,  I guess it would be hafted somehow maybe with sinew n stuff,  its a woman's knife or ulu

 Yeah, as long as a stone point is straight it is very strong as long as the pressure is against the edge or the point, but once the pressure is against one of the sides it will break very easily due to the thinness and also the leverage.  I do a lot of flintknapping and I have to say that a slate blade is wayyyy stronger than a flint one, though not at all as sharp as a flint one.  I read though that the slate ones were used for weapons where a long point that would take abuse was needed, like on the end of a thrusting spear or harpoon as an alternative to bone or antler.

 No, I haven't.  I will have to go check that out!  I'm beginning to suspect that the slate I have is also a little brittle from being on the beach too long exposed to the elements, I know salt water makes quartzite more brittle as I can't knap quartzite cobbles from the beach very well as it tends to chunk rather than flake, but from a lake or a woods it will fake more properly.

Most pieces of slate aren't very good anyway.  Took me a while to find pieces that didn't break easily.  I picked up ~25 rocks, but only took three home.  I was in a vacant lot, a mile from the ocean.

I'd say the material was too soft. I've made several slate knoves and whenever I run into a problen like this, I put a slightly hight angle on the edge and it seems to help. A nice thin edge is fantastic to behold as long as the slate will allow it, but sometimes adjustments need to be made to the original plans

Ever since I saw ground slate knives and point in a museum in Finland, I have been enthralled with them. I'll try to find the link and post it here.

Beautifull