These beads are made of cow bone from Kenya. The white bone is stained a dark brown except for the portions of the bead that were coated with a wax that leaves a distinctive pattern on the beads.

. The individual beads may measure between 26 mm -- 28 mm x 8 mm x 10 mm. The pattern is that of elongated diamonds parallel to each other going around the circumference of the bead. Sold by the piece.