Black Ethiopian Opal Plain Rondelles measure approximately 2.5mm graduating up to 4.5mm in diameter size, these Opal gemstones have a waxy luster with excellent polish, these beads show slight internal characteristics within semi-translucent bodies, these Ethiopian Opal beads have scattered play of color in green-red-golden-blue hues, their body is a deeply saturated treated black hue with a blue tone, and these Opal are mined from the Wollo Region, Ethiopia in Africa. AA Grade