The Cobalt Blue Quartz beads in this bar necklace have amazing colors. The polished surface on the quartz is cobalt blue but, when the necklace is at an angle you can see dark purple and gold. They are just beautiful! The quartz beads are 10mm and are wire wrapped in sterling silver. The bar length is approximately 3 1/8″ and is attached to a sterling silver chain. The closure is also sterling silver. The necklace is 18″ in length.