Blue john drop dragonfly silver earrings e1754rthese unmissable drop earrings boast two cabochon pieces of rare blue john stone that has been sourced directly from treak cliff cavern in castleton the stone is set within the sterling silver belly of the enchanting and intricately crafted dragonfly designrall our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team of skilled craftsmen turn the raw blue john stone into these stunning p