Silver Blue John Marcasite Pointed Pear Hook Earrings. E2239. These stunning drop hook earrings feature pointed pear shaped hand carved Blue John gemstones set at the heart of a Sterling Silver and Marcasite frame. These earrings use only the finest Blue John stone which has been source directly from Treak Cliff Cavern in Castleton. They hang elegantly from sterling silver hooks. All 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 pieces of jewellery. You can find other matching Blue John jewellery and other Blue John rings on our website. Silver Blue John Marcasite Pointed Pear Hook Earrings. Total size 46x15mm, Blue John stone 9x8mm.