Silver blue john marcasite slim pear drop necklacep2978 this stunning pendant features a slim pear drop shaped hand carved blue johngemstone set at the heart of a sterling silver and marcasite frame a very eye catching pendant with a vintage feel this piece uses only the finestblue johnstone which has been source directly from treak cliff cavern in castleton the pendant hangs beautifully from a fluid18 silver chain all our blue john jewellery is designed and crafted within our very o