Bead Size: Barrel Bead: 29x21x21mm Specific Gravity: 2.4-2.9. The natural color is permanent. The surface of the turquoise has been polished. Ny6designs is well known for its huge selections of Turquoise in North Texas and online; we have over 100 selections of Turquoise round beads and cabochons as well as finished Turquoise jewelry.