These necklaces are woven using tarnish proof copper, stainless steel or brass. This crochet technique is an ancient tradition on the island of Sumba in the Indonesian Archipelago. We”ve applied the artisan’s abilities to a more modern design destined to turn heads wherever it is worn. The necklace is very flexible. The copper and stainless ones are tarnish proof. The brass one will develop a nice patina. FREE EXPRESS SHIPPING