This beaded necklace measures approximately 24 inches long. It is made of a variety of sea opal glass beads and hill tribes fine liquid silver with a six-sided sea opal round bead in the center. Also known as opalite, sea opal is a translucent milky- colored glass with blue flashes. It gets its name because of the opal-like luminescence. Some say that the glowing color of sea opal resembles the color of the full moon.