These Black Ethiopian Opal Plain Coin beads are sourced from the Wollo Region in Ethiopia, which is known as the only African source of Black Opal. Measuring 4mm and graduating up to 7mm in size, these beads have a smooth polish and exhibit a strong play of color in red, blue, and green on their translucent dark bodies. With their waxy luster and symmetrical coin shape, these AA quality beads are sure to add exceptional fire to any jewelry piece.