9ct Yellow Gold Blue John Large Oblong Ring. R064. This stunning statement ring is part of our handmade Heritage collection and features a highly polished cabochon of the finest Blue John stone which has been sourced directly from Castleton, Derbyshire. The hand carved gemstone is presented in a minimal 9ct yellow gold setting and completed with a wide statement band creating a bold, contemporary design. 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 stunning 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: Blue John: 31mm x 15mm, Width of band at back: 7mm.