Approximately 18mm round paintbrush jasper gemstone beads. There are 20-24 beads per 16" strand. Paintbrush Jasper ~Descriptive. These beads have been enhanced to bring out their natural beauty. Focal patterns are usually black, brown or red, and are juxtaposed with a white, tan, gray, or pink "background". Questions? Call our friendly sales staff at 1-800-366-2156, or email us.