The material is unknown. Artificial resin? Amber? I'm not sure, as I don't know much about it... It looks beautiful, but it doesn't seem to be a mineral. The necklace cord was something I put through myself, and it's not all handmade. There's a faint marking on the back that looks like 925, but the material of the base is also unknown. ※ The yellow part easily comes off the base. ※ There are scratches and dirt overall. Please consider this as a junk item.