Ethiopian Wollo Black Opal Straight Drill Plain Oval Nuggets measure approximately 4x3mm graduating to 12x11mm in size. These black opal have a way luster on an opaque body, the beads have smooth polish on an asymmetrical oval shaped body. These Opal beads originate from the Wollo Region in Ethiopia which is the only African source for Black Opal. The beads show a strong Red and Green play of color on the dark black and blue bodies for exceptional fire. These beads are well matched for quality on the strand. Beautiful Red, Blue, and Green Fire!