This bracelet is made from an interesting stone called dumortierite, or "the denim stone"; this mineral is naturally blue and is very hard, taking a good polish
The dumortierite beads alternate with black-dyed chacedony beads and silvertone beads; the heart shaped pewter toggle clasp is easy to do with one hand
See also matching earrings called at ASIN B0180ZT6K6, and necklace at ASIN B01JCYQ4NG; the bracelet has an internal circumferance of exactly 6.5" and will fit an average adult wrist