Approximately 8x5mm gemstone faceted rondelles. 72-88 beads per 16" strand. Variations in color and size are to be expected in gemstone beads. Rhyolite, This stone is not always available, so order now while supplies last. This "rainforest" variety of rhyolite often displays interesting banding. Questions? Call our friendly sales staff at 1-800-366-2156, or email us.