Add these natural Heishi black lip shell beads to your jewelry designs for an organic and fun look. These beads are approximately 4-5mm, but diameter will vary and they are available in 16-inch strands. These shells vary in color from seaweed greenish-black to amber and ivory white. They look as if they just washed ashore, pulled in by the ocean waves. For a truly nautical theme, check out our sea life section and give your designs the beach treatment.