This Full Persian weave necklace is made up of stainless steel and Niobium links.  Neither Niobium nor Stainless steel will tarnish.  The sea-green Niobium links in the necklace are also hypoallergenic and as strong as titanium.  This necklace measures 17 3/4" long adjustable with a stainless lobster clasp to 21" in length.