Silver blue john marcasite leaf pendant necklace p2120 this blue john and sterling silver pendant features a hand carved teardrop shaped blue john gemstone which has been sourced directly from the treak cliff cavern castleton in derbyshire set within a detailed beaded sterling silverframe in a feminine leaf design and accented with sparkling marcasite gemstones itis supplied complete with an 18 sterling silver chain all our blue john jewellery is designed and crafted within our very