you have 
This 31 inch necklace imported from Africa is strung on raffia fibre. The beads are round 7/16" by 5/8" in diameter. As I understand, the beads may be made from olive jars or possibily the name is due to their colr. They appear to be frosted olive green with a white and yellow pattern..
Another great necklace or use the beads in creating other jewelry!