black tourmaline bracelets as the name indicates, it’s a strong protective stone that stands as a guard against negative energy and evil thoughts directed our way. black onyx is a stone of focus, determination and drive. protective amulet against the “evil eye” from others. chakras : black tourmaline balances the base chakra. size: this bracelet is adjustable and will fit all sizes. bead size :- 8 mm material used :- black tourmaline and metal and elastic threads the bracelet will arrive to you cleansed and energized note : image shown above is indicative only, as a stone is born from nature it may slightly differ in color, shape & lusture from each other just like two humans are not born exactly same. **medical disclaimer** all above mentioned descriptions are according to indian & chinese mythology & the seller takes no responsibility whatsoever for any claim made in the descriptions. healing benefits of stones should not be intended as a substitute for advice from your physician or other healthcare professional.