Sterling Silver Blue John Ball Point Pen G898 This classic sterling silver ball point pen features highly polished rare Blue John stone, sourced directly from Castleton, Derbyshire. Every piece of Blue John is different making each pen one of a kind. The sterling silver and Blue John pen is the perfect personal accessory or gift.  All our Blue John accessories are 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 accessories.  All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.