Yellow Gold Plated Sterling Silver Smoky Quartz and CZ Halo Cushion Shaped Necklace. This classic halo 18 inch necklace features a 10x7mm genuine cushion shaped smoky quartz surrounded by a halo of .24cttw of simulated diamonds. Also features stones set in stations up the chain. All stones are set in yellow gold plated sterling silver and come with a full lifetime warranty. Covers any and all stone loss, plating wear or breakage.