These pearls are not to be confused with traditional pearls, which are formed inside oysters and other mollusks. Clam pearls are concretions of calcium carbonate, formed as a response to irritants or foreign objects that make their way into the clam’s soft tissue. Over time, the clam secretes layers of nacre (the same substance that makes up the lustrous coating of traditional pearls) around the irritant, slowly forming a pearl.Quahog pearls come in a variety of shapes, sizes, and colors, and their value depends on factors such as size, luster, shape, and overall quality. While they are generally less well-known and less valuable than oyster pearls, they are still considered unique and beautiful natural gems.Collectors and enthusiasts of pearls and natural gemstones often appreciate clam pearls for their rarity and individuality. They can be used in jewelry, but their irregular shapes and colors make them more suitable for unique and artistic pieces rather than the traditional, uniform pearls commonly used in jewelry.