This particular type of bead is made from jasper, a type of chalcedony that is opaque and usually black and white in color. The beads are round, with a diameter of 6mm, and are highly polished to give them a glossy finish. They come in a strand that measures 16 inches in length and contains approximately 66 beads. These beads are perfect for use in jewelry making, whether you're creating a necklace, bracelet, or earrings. They add a touch of natural beauty to any project and are sure to impress.