Pure Series - Clean and chic, a cool swipe of silver punctuated with a flash of authentic sea glass in Cobalt Blue. Sterling silver. 1/2'' - 3/4'' (12-22 mm) sea glass focal. Adjustable bypass band ring. Size 6 - 8. We do not alter our sea glass in any way. Its color, shape & surface are created solely by the power of the sea. Variations of natural sea glass & the handmade process insure every piece of jewelry is absolutely special.