18kt yellow gold surrounds the stone with sterling silver backing, gold posts, and gold ear backs.
"Adularescence is the optical phenomenon that causes the extraordinary glow on the surface of moonstone. The light moves across the stone much like moonlight would glide across a large body of calm water. This happens when light reflects off of the thin layers of different feldspar minerals within moonstone. The layers act as a diffuser, softening the light and allowing it to bounce around the stone."