9ct Yellow Gold Blue John Round Swirl Stud Earrings. E1625. This dainty pair of earrings have been created using the finest quality, hand carved Blue John which is sourced directly from the Treak Cliff Cavern in Castleton, Derbyshire. The circular Blue John gemstone is surrounded by a swirl design of 9ct Yellow Gold. The earrings are completed by post and butterfly fasteners for easy and secure wear. All our Blue John jewellery is designed and crafted within our very own workshops in Derbyshire where a team of skilled craftsmen turn the raw Blue John into these stunning pieces of jewellery. You can find other matching Blue John jewellery and other Blue John rings online and instore. Your purchase will be securely dispatched with our elegant, personalised jewellery packaging. Dimensions: 6mm x 6mm, Blue John; 2mm x 2mm.