Aquamarine is a type of beryl with a legend that it is a treasure of the sea spirits. The color varies from pale blue to deep blue, and milky, but all of them are reminiscent of the beautiful sea. High-quality ones are treated as gemstones. As the name represents water and the sea, it has long been treasured as a talisman for safe voyages to prevent maritime accidents, but now it is very popular as a "stone symbolizing a happy marriage." Size: Inner circumference approx.: approx. 16±1cm Bead diameter approx.: 11mm Please check the attached photos and bid with your understanding. Thank you very much.