White agate pendant on gunmetal chain necklace 
This necklaceâs centre of attention is indeed the gorgeous oval Natural Onyx marble gemstone (34mmx24mmx8mm), wired with gunmetal jumprings and wires on gunmetal chain with small rectangles and squares of moss agate gemstone, and shiny cylinders of hematite gemstone. The necklace is 22 inches long, plus a pendant of 2 inches long & 1 inches wide and closes with a matching gunmetal lobster clasp. I hope you'll like it as much as I do!!