Sterling silver blue john twelve stone pear shaped celtic bracelet b599 this elegant bracelet features twelve pear shaped hand carved blue john gemstones that have been sourced directly from the derbyshire blue john cavern in castletonthe highly polished blue john gemstones are framed within a unique sterling silver celtic design which fastens securely with a classic lobster clasp for easy wear all our blue john jewellery is designed and crafted within our very own workshops in ashbourne