These are called Super 7 crystals found in Brazil. They are made with 7 crystals: Amethyst, Smokey Quartz, Rutile, clear Quartz, Goethite, Lepidcrocite and Cacoxenite. It is a stone deeply connected to the Holy Spirit. It harmonizes the body, cellular memory, immune system, and assists in healing all sicknesses including conditions related to skin and bones. It’s known as the Melody stone. Because it is made with some of the most powerful crystals, it can clear all 7 chakras when you are feeling stressed and overwhelmed. These bracelets are made with 12mm sized beads.