A magnificent, museum-quality investment piece from the French Napoleon III era (Second Empire, circa 1852–1870). This exceptional transforming grand brooch (Devant-de-corsage / Stomacher) is an extraordinary showcase of high-aristocracy jewelry art, masterfully set with an impressive array of antique rose-cut diamonds totaling an estimated 5.5 to 6.5 carats in visual spread.The balanced, symmetrical openwork design is anchored by a powerful central triptych: a massive central oval rose-cut diamond flanked by two substantial pear/oval shaped matching rose-cut diamonds. This core layout is enveloped in an intricate, double-tiered openwork frame densely encrusted with dozens of smaller graduated rose-cut diamonds. Articulated hanging drops at the top and bottom complete this regal, imperial silhouette.Following the strict elite traditions of the Second French Empire, the entire top settings are meticulously hand-crafted in high-grade silver to seamlessly blend with the ethereal white glow of the rose-cut stones, creating a dramatic contrast with the historic dark patina. The structural undercarriage and the secure pin system are executed in solid 18 karat yellow gold. The gold needle is struck with the official French "Hibou" (Owl) hallmark, guaranteeing its authentic 18k / 750 gold status.The diamonds are masterfully foil-backed within closed settings—a historic technique specifically designed to maximize their soft, enchanting, and mysterious brilliance under evening candlelit conditions.
Attributes & Specifications:Period: Napoleon III Era (Second French Empire)Date of Manufacture: Circa 1860
Design Type: Convertible Devant-de-Corsage / Large Brooch-Pendant
Metal: Solid 18k Yellow Gold Base with High-Grade Silver Top SettingsHallmark: French "Hibou" (Owl)
Hallmark (Official state verification for 18k / 750 gold)
Total Diamond Weight: Estimated Approx. 6.00 Carats (Visual spread)
Diamond Cut: 100% Antique Rose-Cut Diamonds (Roos geslepen)
Weight:12.16 gram
Condition: Exceptional antique condition. The silver displays a magnificent, untouched historic patina that provides incredible depth.
All stones are original and securely set.
Wear: Consistent with age and history.
