Except the bead to the left these are "European" beads? Somewhat between 1700/1800...?
I would guess, the bead at the left was grind into this shape longer time ago. My first thought was "a blue Hebron bead", but India came to my mind too...
The other three are 12.5 -17.5mm in length with 3-4mm opening, the first one to the left a conical opening from 4 -6mm and some black inside, but this is same for Indian or Hebron beads...