Image 1 of 4 Image 2 of 4 Image 3 of 4 Image 4 of 4 Puka Shell Necklace $20.00 Purple beads mixed with the lip shell puka makes a nice necklace perfect for the beach, it’s 16 1/2 inches long. Add To Cart Added! Purple beads mixed with the lip shell puka makes a nice necklace perfect for the beach, it’s 16 1/2 inches long.