Sterling Silver Blue John Marcasite Garnet House Style Dragonfly Brooch. M329. Complementing our sterling silver and enamel designs, the introduction of sparkling and natural marcasite stones provides a classic and elegant way to accessorise any outfit. With a certain Art Deco feel, accompanied by Derbyshire Blue John and Garnets, the collection features wonderful insect earrings, brooches, rings and pendants. This gorgeous dragonfly brooch is hand made in Sterling Silver and features a beautifully hand carved Blue John gemstone set in the body, sparkling Marcasite gemstones set in the wings and tail and glittering Garnets set eyes and tail tip. This is an exquisite and detailed piece which would make a beautiful gift. The Blue John stone has been directly sourced from Treak Cliff Cavern in Castleton. Dimensions: 39mm x 32mm.