red tourmaline (single) green aventurine (single) lilac (single) tigereye (single) indian agate (single) blue grain stone (single) amethyst (single) rose aurora (single) white crystal (single) pink crystal (single) white turquoise (single) labradorite (single) unakite (single) spotted stone pallisandro classico (synthetic single) blue sand stone (synthetic single) opal (synthetic single) green dot (single) obsidian

inner diameter 18 ~ 20mm