Diamond Brooch or Pendant. Signed Black Starr & Frost platinum brooch or pendant displaying a central oval faceted amethyst with a lobed openwork surround of foliate form featuring an array of full and single cut diamond accents. Amethyst measures approx. 24.0mm x 34.0mm. With hinged bail. Stamped verso, "B.S.&F". Total approx. weight is 20.5 dwt (gross). From a Hollis, NY estate. Dimensions: brooch measures approx. 1.90" w x 1.50" h.品相报告: Good, with light surface scratches and minor dings/dents.