Yellow gold (750) and platinum (850) transformation necklace formed of forçat mesh and leaf and scroll motifs, punctuated with faceted rubies and rose-cut diamonds in beaded closed setting and punctuated with oval or round opal cabochons. The detachable central element can form a brooch or independent pendant, holding a white keishi pearl. Clasp ring spring. Around 1900-1910. Gross weight : 28 g. - Length : 43 cm. In a case with the shape. Missing the pin of the central element.