Magnificent and rare convertible necklace-brooch, Paris, circa 1870-1880, crafted in 18K yellow gold with a thin silver layer for diamond settings. Features neo-classic and late Victorian motifs, set with 66 European round and rose cut diamonds (approx. 3.46 ct, F/G, VS/SI) and two cultured 7 mm white pearls. Pendant brooch measures 43 x 60 mm (1.70 x 2.36 in); total weight 20.2 grams. Fitted with concealed hooks for necklace wear, removable pin-bar for brooch use, and accompanied by a 17-inch platinum chain with 97 seed pearls. Superior craftsmanship and exceptional period detail. The overall condition of this necklace is excellent. Beside the little normal wear, there is no damage to the gold. The 68 gemstones are secured in their settings. This piece has been carefully inspected to guarantee the condition and authenticity.