SMALL BROOCH In platinum and white gold, set with an old-cut cushion ruby weighing approximately 3.60 cts, the shoulder set with old-cut diamonds. Hallmarked Menu Michel & fils in Paris. Circa 1920. In a shaped case. A diamond, platinum and 18k gold brooch set with an old cut cushion shaped ruby weighing approxymately 3,60 cts. Circa 1920. C.G.L. certificate attesting: origin Burma (Myanmar), no heat. RC : Hallmark : A.M. star in the centre, within a horizontal lozenge. This workshop made jewellery for Boucheron, among others. Dimensions of the stone: approx. 8.5 x 8.0 x 5.7 mm. Brooch size: approx. 0.9 x 5.2 cm. Gross weight: 5.9 g (Pt - 950 and 18k - 750).