Blue chalcedony makes me think of the Duchess of Windsor’s famous Suzanne Belperron necklace (later knocked off by Kenneth Jay Lane). It’s a very soothing, icy shade. Here, Julie Collection offers shades of blue chalcedony (the piece also comes with other coloured stones) for USD $365 set in gold plated metal. It measures 19 inches and closes with a shepherd’s crook clasp.