9ct yellow gold blue john toscana offset teardrop ring r514 this striking ring is part of our toscana collection and features a stunning teardrop shaped cabochon of rare blue john stone that has been directly sourced from treak cliff cavern in castleton the stone has been secured within an exquisite 9ct yellow gold setting which compliments the blue john beautifully the ring is completed by a classic yellow gold band all our blue john jewellery is designed and crafted within our very own wo