Type: Other I received this as a souvenir from a relative from China several years ago. I have treasured it, as it is said to bring good luck. The natural stone is a large, round bead with a diameter of 19mm. The color is a calm ivory, and each one is slightly different, but please rest assured that this is due to the nature of the stone. I believe the natural stones are aragonite and yellow calcite. Thank you for your understanding.