Five Piece  Freshwater Cultured Pearl and Black Onyx and Gold-Filled Beads Stretch Bracelets Sleek black onyx stones lend an edgy, contemporary air to these five stretch bracelets, whose elegant white pearls provide a touch of timeless sophistication. The natural properties and process of pearl formation define the unique beauty of each pearl. The image may show slight differences in texture, color, size and shape. Carved rings are naturally occurring imperfections that result from the pearl rotating inside the mollusk as it is growing. They define the unique beauty of each pearl and may vary in size, number and depth per pearl.