Bidspirit auction | AMERICAN HAMMERMAN BROTHERS 18K DIAMOND

AMERICAN HAMMERMAN BROTHERS 18K DIAMOND BROOCH, C. 1970 - An American floral starburst brooch by Hammerman Brothers (founded 1946, New York), circa 1970, crafted in 18k yellow and white gold and set with round brilliant diamonds, total gross weight 24 grams (23.9 grams per accompanying report). Designed as a swirling seven-petaled blossom, the composition alternates textured, fringe-edged yellow gold petals with curved white gold ribbons bead-set with graduated diamonds, radiating from a central prong-set round brilliant diamond encircled by seven halo stones. The hollow-backed reverse features open gallery settings, a straight horizontal pin stem with a roller safety catch, an incised number '3918' along an inner petal edge, and a stamped rectangular cartouche on the central frame containing the conjoined 'HB' maker's monogram and '18K'. Accompanied by an American Appraisal Association retail insurance replacement valuation document dated December 10, 2024 (number 24DM131012), stating an approximate 3.08-carat center stone (H-I color, I2 clarity) and 3.65 carats total weight of accent stones (G-H color, SI-I clarity), graded as mounted. jewelry, pinwheel, vintage, estate, midcentury, cluster, botanical, heirloom, collectible, fine Dimensions D: 2 in. Weight 24 grams. Condition Condition appears consistent with age. The 18k yellow and white gold surfaces display light wear, minor hairline scratches, and slight tarnish within the open reverse galleries. All round diamonds appear intact and secure, and the pin stem and roller catch remain functional. The accompanying paper appraisal shows light handling creases.