These turquoise beads come in four different colors and shades of turquoise for added versatility in jewelry design. The colors consist of natural earth toned blue, natural turquoise blue, greenish copper brown, and beautiful clear blue. These are all natural undyed turquoise beads which have been stabilized. Stabilization hardens and seals the turquoise making it suitable for jewelry use. These turquoise measure 10mmx7mm and are 4mm thick.