The Brontide 4mm Adjustable is for those who like a clean, subtle look. This adjustable bracelet is perfect to combine with other bracelets, but can also be worn alone.The bracelet features gemstones that all carry a valuable meaning. The names Cagliari, Ferrara, Messina, Ravenna, Vicenza, and Volterra are based on the colors that characterize these Italian cities. Is wear-resistant and does not tarnish.