Adjustable men's bracelet in steel half with Venetian chain and half with blue dumortierite and element with black crystals. Energy Stone Collection. Dumortierite diameter: 4 mm. Crystal diameter: 2 mm. Chain Size: 3.5mm. Lobster clasp closure. Adjustable size, from 19 to 21 cm. Material: 316L Steel, Dumortierite, Crystals. Indicative image as these are natural stones and the colors of the bracelet may vary