Approximately 6mm faceted round gemstone beads. 60-74 beads per 16" strand. Turquoise Magnesite. These beads have been enhanced. Magnesite is a white or off-white stone that, when dyed, is an excellent substitute for higher priced turquoise. Dyed turquoise magnesite is often called "Chalk Turquoise". Questions? Call our friendly sales staff at 1-800-366-2156, or email us.