9ct Yellow Gold Blue John Peak District Millstone Large Ring. R515. With proud links to the Peak District, we have created this ring inspired by the millstones which stand testament to our beautiful National Park.  Each piece is a reflection of the natural beauty of the area, with its world renowned and admired Derbyshire Blue John gemstone being at the heart of each design and hand set into textured 9ct yellow gold, representing the millstone itself. 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.  All articles are lovingly and securely dispatched with our elegant jewellery packaging.