Hi all. I'm back looking for some help and prepared with more info this time :) Here are three beads that seem similar in style to me. They came off of a strand I purchased from an estate of a couple of world travelers who spent lots of time in Africa. I have broken this strand apart and am trying to ID the beads a little at a time. Will sell some and keep some samples (don't need multiples of the same bead).

On the left is a bead about 11.5mm, the bore holes are uneven, one is about 3mm and the other end is about 4.5mm. The center has very uneven grooves and looks like dried clay.

The bead in the center is slightly oblong, 9.5mm from hole to hole and 10.5 mm in diameter. These bore holes are also uneven, one end being about 4mm and the other about 3.5 It has the same characteristics inside as the first.

The third bead is almost 5mm from hole to hole and 9mm diameter. Same core characteristics as the other two.

Any thoughts?