your images show an opaque green + yellow bead that might be made of fused (not completely melted) powder glass resembling Krobo beads from Ghana, but it is also very similar to a bead type that used to be described as a Roman period "Date bead" - with a fairly wide hole- roughly oval or bulbous shaped,- green with yellow at one end... around 1 cm long... sometimes striped as shown from my collection. -maybe there is a more up-to-date description?