Brooch in 850 thousandth platinum, the geometrical setting set with ninety-one old-cut diamonds, the largest approx. 0.05 ct, all set with ten onyx pieces (some damaged, minor restoration to setting), pump clasp. French work of the Art Deco period. Total estimated diamond weight: 0.55 ct Height 1.5 cm - Width: 6.5 cm Gross weight : 10 g