Sterling Silver Blue John Marcasite Garnet House Style Honey Bee Brooch. M333. 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. Set within the belly of this adorable bee brooch is a stunning, highly polished Blue John stone that has been sourced directly from Castleton, Derbyshire. The sterling silver bee design has been further embellished by dazzling marcasite stones and garnet eyes, giving the piece a sophisticated sparkle.