This is a beautiful, vintage and rare collectors' item faux pearl cabochon Dior brooch with pavé crystal signed 1990 CHC Grossé. Era is 1990 and was issued in 1991. Was made to commemorate Carnegie Hall's Centennial celebration. There is a tiny bit of a dark smudge in the upper right hand corner of the gold plate; please see first photo. It may be tarnishing or removable with soap and water.