This necklace is made using antique copper rings which are woven together in the Byzantine pattern. It is a very beautiful and complicated chainmaille pattern. The necklace measures 18 inches and has a 3 inch extension, but size can be adjusted upon request. The matching bracelet and earrings are available in my shop. This set is also available in antique silver, antique bronze, silver plate, gold plate and any combination of these metals. (see last picture) If interested, just contact me and I would be glad to post the item you might be interested in.
Other Byzantine designs in my shop http://www.etsy.com/shop/byBrendaElaine/search?search_query=byzantine&search_type=user_shop_ttt_id_5760392&shopname=byBrendaElaine
