An opal skull. The exquisite carved gemstone showcases a milky, translucent quality, allowing for an internal glow that emanates a full spectrum of radiant, opalescent hues. Fine, hair-thin internal veins catch and refract light, enhancing the shifting rainbow effect that dances across its pointed ends and along its subtly ridged edges. Blues, reds, yellows, greens, all appear like a real opal in the light.