Yooperlites, discovered in Michigan, USA in 2017. These color-changing stones shift hues under ultraviolet (blacklight) illumination, making them highly sought-after collector's stones. Experience the wonder of their transformation from ordinary colors to a mystical glow! Material: Yooperlite / Natural Shape: Round Size: Approximately 14mm per bead, inner diameter approximately 18cm Colors: Gray, White, Black, Brown *Color may vary depending on the blacklight used. [Stone Words] Joy, Fun, Positive [Recommended Purification Methods] Sunlight, Moonlight, Cluster, Sage, etc. *Natural stones, born from nature, may contain inclusions, cracks, and minor imperfections. We appreciate your understanding. These do not affect the stone's power. *Colors, patterns, and shapes may vary slightly due to the nature of the stone. *Product images are taken of actual items. For items of the same quality, images taken in the past may be used. *The color of the product may appear slightly different from the actual item depending on your screen and environment.