Black Ethiopian Opal Plain Nugget beads measure approximately 4x4mm graduating up to 13x9mm in 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 play of color in strong green-red-golden-blue hues, their body is a deeply saturated treated black hue with a navy tone, and these Opal are mined from the Wollo Region, Ethiopia in Africa. AA Grade