10MM Super 7 Stones and Stainless Steel Toggle Clasp. The meaning of Super 7 is "hidden gem".  Contains Amethyst, Quartz, Rutile, Smokey Quartz, Geothite, Cacoxenite, and Lepidocrocite.  Said to be excellent for healing and  balancing. Super 7 is only found in Brazil that has all 7 Gems in one.