Large 18K (750) gold and platinum barrette brooch set with a main old-cut diamond surrounded by oval or round rubies, old-cut and rose-cut diamonds. Work of the 1910s. Length : 10 cm approximately. Gross weight: 24.7 g (chips, shocks) A ruby accompanied by a GEM-Paris pre-report (2023) attesting : Myanmar origin, unheated. A ruby accompanied by a GEM-Paris (2023) pre-report attesting : synthetic ruby A 1910 rubies and diamonds brooch