Cut from stunning natural Welo opal, these cabochons are flat-backed with a faceted, polished top. These beautiful stones come in a wide variety of colors which change in shifting light, also known as a "flash" or "fire". These cabochons range in size from approximately 3.5x5mm to 8x13mm. They are sold per randomly selected piece. Please note that some opals may have tiny light chipping on their thin edges.