This imitation crystal is high quality (Grade AAA), K9 glass/crystal. It is very similar to a well known brand in look and quality, but more affordable. Don't be a diamond in the rough; dazzle like a bicone birthstone bead set with 12 or 60 pieces to choose from! Add a touch of sparkly shine to any jewelry making project with these 6mm imitation crystal beauties. Each set includes one of each of the 12 birthstone colors! Your choice of 12 or 60 pieces. -6 x 6 mm -0.7 mm hole -Imitation Crystal Contains small parts. Not intended for children.