This is a "sheep's eye bead" dzi bead ring, a popular style among Tibetan collectibles. The ring face is a natural agate sheep's eye bead, an ancient bead widely circulated in Tibet. The bead's key features are: a white "eye" in the center surrounded by black weathering patterns. This "eye" is formed by the natural banding texture of the agate. Over time, the surface has developed a warm patina and natural wear, giving it a vintage look. In Tibetan culture, the sheep's eye bead is considered a "protective bead," symbolizing the ability to see through illusions and ward off evil, bringing good fortune. It is one of the oldest forms of dzi beads, and many older Tibetans wear it as amulets. It is made of 925 sterling silver and has a silver mark on the inside. Suitable for ring sizes 13 and 14.