you can get flakes like that, it`s simple...
prepare the edge (with lots of abraiding... )
  set it up for the flaking tool of your choice,
squint at it with your left eye closed & tilt your head 
off to the right a little bit... NO... not that much, just 
a little... there ya go, now you got it...
 build pressure slowly & lean into it some, yeah, like that...
flick your wrist to the left a little & it`ll pop off just like
ya want it to, or if you`re like me, you`ll have 2 smaller pieces 
of glass to cut yourself with...    

  Was there any more of that 
good beach glass out there?