Thats a Pretty point ! Yep; That stuff is dream rock.
Jim Minter sent me some of that, 4 or 5 years ago. I carry a small biface of it around in my pocket to keep myself reminded I am a flintknapper ,by God. (The rest is hoarded away from human eyes). My best hunting heads are made of it. Plenty tough and yes ,it works like a dream. Nice ! ' Frank