Make a stunning statement with the 36" 22k Yellow Gold Plated Brass 42-ct. Sea Green Chalcedony Gem By The Yard Necklace with Lobster Clasp. Featuring gorgeous irregular-shaped sea green chalcedony gemstones set on a delicate 22-kt. yellow gold-plated brass chain, this necklace is like a breath of fresh beach air. This elegant gold necklace goes well with anythingfrom T-shirts to dressesand closes securely with a lobster claw clasp.