18ct White Gold Blue John White Mother Of Pearl Double Sided Oval Fob Necklace, P100. This classic double sided fob necklace is part of our Heritage handmade jewellery collection and features an oval locally sourced Derbyshire Blue John gemstone on one side and an oval White Mother Of Pearl gemstone on the other. The stones are framed within a heavy highly polished 18ct White Gold setting with a large ornate bail. This item is complete with an 18 inch White Gold chain.  All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform the natural Blue John stone into these stunning pieces of jewellery. You can find other matching Blue John jewellery and other Blue John necklaces on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions 47mm x 23mm, Blue John and White Mother Of Pearl stones; 25mm x 20mm.