Ethiopian Wollo Black Opal have a way luster on an opaque body, the beads have smooth polish on a symmetrical faceted rondelle 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 bodies for exceptional fire, and these beads are well matched for quality on the strand. Beautiful Play of Color Fire!