These Black Ethiopian Opal Faceted Rectangle beads are sourced from the Wollo Region in Ethiopia, which is known as the only African source of Black Opal. Measuring 4.5x4mm and graduating up to 5.5x4.5mm in size, these beads are well polished and exhibit a strong play of color in red, blue, and green on their translucent dark bodies. With their waxy luster and symmetrical rectangular shape, these AA quality beads are sure to add exceptional fire to any jewelry piece.