Beautiful Swiss enamelled necklace  circa 1800, the central oval plaque has a shell motif set with natural pearls, and the chain is designed as a string of flowers, which originally would have been enamelled too, but is no longer, and still looks beautiful. The clasp has blue enamel and tiny pearls.the plaque measures 42mm x 38mm  and the wearable length is 15.5”18 carat gold