The material is brass.Kowa Crystal #2072やアクリル Use the German Cabochon Round 1, etc. part with glue and use it.It is also recommended as a foundation for decoration such as UV Regine and various clays. *This is an accessory, so you may change the color by incorporating the changes in the fashion.Also, in the process of processing, dark shades of color may occur without prior notice.Please accept.(Depending on the part, there may be a different color variation of the part and color.)