850-millimeter platinum and 18k white gold openwork geometrical lapel brooch set at its center with an emerald-cut sapphire weighing approx. 3 ct, surrounded by thirty eight-eighths-cut diamonds and twenty calibrated sapphires, double-pin clasp. 1930s, Art Deco period. Sapphire size: 10 x 6.5 x 4.6 mm Total estimated diamond weight: 0.70 ct Height 3.4 cm - Width: 2.6 cm Gross weight : 11,7 g