This bracelet is made with 8mm beads. Black tourmaline is a highly protective stone which can repel and block negative energies. Black tourmaline can also aid in the removal of negative energies within a person or space. It may help to purify and transform dense energy into lighter vibrations. Shamanic dream stones have all great qualities of clear quartz plus the additional vibrations of their different inclusions: Chlorite, Lodolite & iron They can also have smokey quartz, phantoms and rutilated quartz as well. Its energy is very gentle & soft & makes a great crystal for meditation & for Shamanic journeying.