※ To prevent any issues, please be sure to read my profile before purchasing. My mother bought this approximately 20-30 years ago for around ¥1,500. The color is a slightly greenish black, with a cool, rusty metal look and a subtle shimmer, making for a very lovely color. There is some wear on the surface of the bead (see photo 5), though it's on the back side when worn, so it's not very noticeable. Material unknown. ✳️ All metal accessories I'm selling have been carefully cleaned by me, paying attention to as much detail as possible, and then wiped down with alcohol wipes, again paying attention to detail. I am not a professional, so it's not perfect, but I do my best to provide them in a clean condition.