Sterling silver blue john four stone small dragonfly necklace p1896 this striking pendant boasts four unmissable tear drop shaped cabochon pieces of rare blue john stone that has been directly sourced from treak cliff cavern in castleton the stone has then been set into an intricately crafted sterling silver dragonfly design that sits gracefully on a elegant 18 sterling silver chain all our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire wh