Victorian diamond bouquet brooch, en tremblant, si

Victorian diamond bouquet brooch, en tremblant, silver topped gold, designed as a spray of wheat and flowers bound with ribbons and bows, the spring-mounted blossom having a good mine-cut diamond, approx. 1.65 cts, shieves of wheat are flexible, 9.5-10 cts of other mine- and cushion-cut diamonds throughout, the removable pin back indicates the brooch was part of a conversion suite, 3 1/2" x 1 3/4", probably English, c. 1870