Royal Crown Derby Mikado Sterling Silver Foxtail Purple Cushion Ring. RUNQ0001191. This feminine ring has been designed as part of our exclusive collection with Royal Crown Derby. It features fine bone china from the popular Mikado design from Royal Crown Derby and is framed by our handmade sterling silver woven foxtail design. All our Foxtail jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform the raw materials into these stunning pieces of jewellery. You can find other matching Foxtail jewellery and other Foxtail rings on our website. Dimensions: 15mm