Silver Blue John Marcasite Two Stone Pear Bangle. B881. This exquisite bangle features two simple pear shaped Blue John stones in the centre that have been sourced directly from Treak Cliff Cavern in Castleton. Surrounding the Blue John, marcasite has been set along the finely detailed sterling silver band to create an elegant feminine look. The bangle is fastened with a safely clip for extra security when wearing. 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 bangles on our website. Silver Blue John Marcasite Two Stone Pear Bangle