Ethiopian Opal Beads Plain Rondelles measure approximately 3mm graduating up to 7mm in diameter size, these Opal gemstones have a waxy luster with excellent polish, these beads show no visible matrix on their translucent bodies, these Ethiopian Opal beads have fair play of color in blue-green-red-violet-periwinkle hues, their body is a predominantly grayish blue hue, and these treated Opal are mined in Ethiopia Africa.