9ct Yellow Gold Blue John Marquise Ring. R404. Part of our handmade Heritage jewellery collection, this ring features a cabochon of highly polished Blue John which has been sourced from Castleton, Derbyshire. The hand carved gemstone is set in a marquise shaped setting and completed with a classic 9ct yellow gold band.  All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform natural pieces of Blue John into these stylish pieces of jewellery. You can find other matching Blue John jewellery on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.  Dimensions: cabochon 6mm x 11mm, width of band 3mm.