Sterling silver blue johnowl necklace p872 set within the eyes of this cute and quirky owl pendant are two stunning round blue john stones that have been sourced directly from treak cliff cavern in castleton the sterling silver owl design is further embellished by open detailing and hangs gracefully from an 18 inch long silver chain complete with a classic bolt ring clasp all our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team o