Blue john necklace oblong silver p020 this simple and sophisticated necklace is part of our heritage handmade jewellery collection andboasts a stunning cabochon oblongpiece of rare blue john stone that has been sourced directly from treak cliff cavern in castleton the stone is framed within an exquisite sterling silver setting the pendant sits gracefully on a delicatesterling silver chain that is completed by a classic bolt ring clasp for easy wear all our blue john jewellery is designed