What characterizes a circled pearl?

A circled pearl is specifically characterized by the presence of one or more distinct grooved or ridged rings encircling its body. These rings are a result of the natural formation process of the pearl, during which the mollusk produces layers of nacre. The irregularities in the nacre deposition create these grooves or ridges, making circled pearls visually unique.

The presence of these rings can add to the aesthetic appeal and value of the pearl, as they can enhance its beauty and distinguish it from other types of pearls that do not exhibit such features. In contrast, a smooth surface without imperfections would indicate a different type of pearl that lacks this distinctive circling, while a pearl with a single smooth groove would not meet the criteria for being considered circled. A dyed pearl pertains to those that have undergone a treatment process to alter their color, which is not relevant to the defining physical features of a circled pearl.